Updated on 2024/03/06

写真a

 
Suzuki Yasuhito
 
Organization
Graduate School of Engineering Division of Science and Engineering for Materials, Chemistry and Biology Associate Professor
School of Engineering Department of Applied Chemistry
Title
Associate Professor
Affiliation
Institute of Engineering

Position

  • Graduate School of Engineering Division of Science and Engineering for Materials, Chemistry and Biology 

    Associate Professor  2023.04 - Now

  • School of Engineering Department of Applied Chemistry 

    Associate Professor  2023.04 - Now

Degree

  • 博士 ( Others )

Research Areas

  • Nanotechnology/Materials / Polymer chemistry

  • Nanotechnology/Materials / Polymer materials

  • Nanotechnology/Materials / Polymer chemistry

Research Interests

  • 高分子材料

  • 高分子化学

  • 結晶

  • 界面

  • 力学物性

  • ガラス

Research subject summary

  • 高分子化学

  • 高分子ダイナミクス・緩和

  • バルク重合

Research Career

  • バルク重合中の熱暴走の理解と制御

    トロムスドルフ効果、重合誘起相分離、ガラス化  Individual

    2018 - Now 

  • 重合誘起相分離を利用した機能性材料開発

    重合誘起相分離、PMMA、モノリス 

    2018 - Now 

  • 剛直高分子のβ緩和挙動

    β緩和、誘電緩和、ポリフマル酸エステル 

    2018 - Now 

Professional Memberships

  • 高分子学会

    2018.04 - Now   Domestic

  • 一般社団法人日本レオロジー学会

    2020.04 - Now   Domestic

  • アメリカ化学会

    2018.04 - Now   Overseas

  • 接着学会

    2018.04 - Now   Domestic

Committee Memberships (off-campus)

  • コンテンツ委員会委員   一般社団法人 日本接着学会  

    2022.08 - Now 

  • 接着の技術誌 編集委員   一般社団法人 日本接着学会  

    2022.08 - Now 

  • 関西支部 若手研究会 幹事   公益社団法人 高分子学会  

    2020.04 - Now 

  • 関西支部 若手の会 幹事   一般社団法人 日本接着学会  

    2019.04 - Now 

Awards

  • 2023年度大阪公立大学若手研究者奨励賞 基礎科学部門

    2023.08   大阪公立大学  

  • 高分子研究奨励賞

    2022.03   公益財団法人 高分子学会   ガラス化近傍における局所的高分子ダイナミクスの解析と制御

  • 日本接着学会 奨励賞

    2021.06   日本接着学会  

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    Country:Japan

  • Polymer Journal論文賞-日本ゼオン賞

    2020.05   公益社団法人 高分子学会  

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    Country:Japan

Job Career (off-campus)

  • 大阪公立大学大学院, 工学研究科, 准教授

    2023.04 - Now

  • 大阪公立大学大学院, 工学研究科, 助教

    2022.04 - 2023.03

  • 大阪府立大学大学院, 工学研究科, 助教

    2018.04 - 2021.03

Papers

  • Study on the deformation and fracture of epoxy monoliths through mechanical tensile and compressive tests and X-ray CT imaging

    Aragishi K.

    Polymer Journal   2024.02( ISSN:00323896

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  • マレイミドベンゾオキソジンとチオール変性シルセスキオキサンの付加物から得られる熱硬化物の熱および機械的性質

    杉浦幹太, 鈴木祥仁, 松本章一

    日本接着学会誌   2024.01

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    International / domestic magazine:Domestic journal  

  • Fabrication of a BOC-Protected 2-Hydroxyethyl Methacrylate Brush and Deprotection of the BOC Group to Control the Surface Hydrophilicity

    Suzuki Y.

    Langmuir   39 ( 48 )   17216 - 17221   2023.12( ISSN:07437463

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    Authorship:Lead author, Corresponding author  

    DOI: 10.1021/acs.langmuir.3c02259

    PubMed

  • ポリフマル酸エステルのβ緩和 Reviewed

    鈴木祥仁, 松本章一

    日本接着学会誌   2023.12

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    Authorship:Lead author, Corresponding author  

  • Synthesis of thermosets from maleimidobenzoxazines and tetrafunctional thiols and their thermal and mechanical properties

    Minako Takasu, Kanta Sugiura, Saki Sugimoto, Yasuhito Suzuki, Akikazu Matsumoto

    Polymer Journal   56 ( 1 )   17 - 30   2023.10( ISSN:00323896

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/s41428-023-00841-1

  • Effect of adding lithium chloride on the radical copolymerization of lithium p-styrenesulfonate and acrylamide

    Haruki Uesaka, Yasuhito Suzuki, Shinji Ozoe, Yusuke Shigeta, Akikazu Matsumoto

    Polymer Journal   55 ( 10 )   1057 - 1066   2023.10( ISSN:00323896

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/s41428-023-00802-8

  • マレイミド共重合体のエステル交換反応とチオール・エン反応による耐熱透明ポリマー材料の合成

    山本紘希, 鈴木祥仁, 松本章一

    日本接着学会誌   2023.10

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    International / domestic magazine:Domestic journal  

  • Radical copolymerization of lithium p-styrenesulfonate followed by homopolymerization of a less-reactive comonomer with spontaneous delay

    Uesaka H.

    Polymer   283   2023.09( ISSN:00323861

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  • Heterogeneities at the Onset of Reaction Acceleration during Bulk Polymerization of Methyl Methacrylate Investigated by Small-Angle Neutron Scattering

    Yasuhito Suzuki, Yuya Doi, Ryutaro Mishima, Koichi Mayumi, Akikazu Matsumoto

    MACROMOLECULES   56 ( 10 )   3731 - 3738   2023.05( ISSN:0024-9297

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    During bulk free-radical polymerization of methyl methacrylate below the glass-transition temperature of poly(methyl methacrylate), the relative fraction of monomer and polymer changes as the reaction proceeds. The liquid monomer is eventually converted to a solid glassy polymer. In other words, polymerization-induced vitrification or glass transition occurs. This process was traced by small-angle neutron scattering (SANS). The scattering profile discontinuously changes at the vicinity of vitrification. This discontinuous change was correlated with a sudden reaction acceleration known as the Trommsdorff effect. Ornstein-Zernike analysis revealed that the intensity at q = 0 (I(0)) and the correlation length of concentration fluctuation (xi) suddenly increase at the discontinuous change of the scattering profile. The obtained data implies that the increased heterogeneity (i.e., microscopic concentration fluctuation) is intimately related to the Trommsdorff effect.

    DOI: 10.1021/acs.macromol.3c00176

  • Analysis of Glass Effect and Trommsdorff Effect during Bulk Polymerization of Methyl Methacrylate, Ethyl Methacrylate, and Butyl Methacrylate Reviewed

    Y. Suzuki, R. Mishima, E. Kato, and A. Matsumoto

    Polym. J.   53 ( 3 )   229 - 238   2023.03( ISSN:0032-3896

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    It has been reported that the hydration state of biocompatible polymers, such as poly(ethylene glycol) (PEG), affects their bioinertness. PEGylated dendrimers have been studied for use as drug carriers. In our previous study, the hydration behaviors of PEG and PEGylated dendrimers were analyzed using differential scanning calorimetry (DSC) to investigate the relationship between hydration and in vivo behaviors. In this study, the hydration behaviors of PEG and PEGylated dendrimer were analyzed using X-ray diffraction (XRD) and infrared (IR) spectroscopy. According to the XRD analysis, ice was formed and melted in the PEG/water mixture with a 20% water content below 0 degrees C during the heating process; however, PEG crystals were formed in the PEG/water mixture containing 70% water. The XRD and IR results of the PEGylated dendrimer/water mixture were similar to those of the PEG/water system containing 70% water. Our IR spectral studies indicated that the hydration state of the PEGylated dendrimer was different from that of PEG containing 20% water. These results suggested that a comprehensive study is important for the analysis of such eutectic mixtures of PEG compounds and water.

    DOI: 10.1038/s41428-022-00700-5

  • Comparative Study of PEG and PEGylated Dendrimer in Their Eutectic Mixtures of Water Analyzed Using X-ray Diffraction and Infrared Spectroscopy Reviewed

    C. Kojima, Y. Suzuki, Y. Ikemoto, M. Tanaka, and A. Matsumoto

    Polym. J.   55 ( 1 )   63 - 73   2023.03

  • Polymerization-Induced Vitrification, Apparent Phase Separation, and Reaction Acceleration during Bulk Polymerization Invited Reviewed

    Y. Suzuki

    Polym. J.   2023.03

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    Authorship:Lead author, Last author, Corresponding author   Publishing type:Research paper (scientific journal)   International / domestic magazine:International journal  

  • 分子内および分子間水素結合を有するポリジアセチレンの色調変化と熱安定性

    中村純也, 畑 敏達, 鈴木祥仁, 松本章一

    色材協会誌   2023.02

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    International / domestic magazine:Domestic journal  

  • Non-destructive observation of internal structures of epoxy monolith and co-continuous network polymer using X-ray CT imaging for elucidation of their unique mechanical features and fracture mechanism Reviewed

    R. Tominaga, Y. Takeda, M. Kotera, Y. Suzuki, A. Matsumoto

    Polymer   263   125433   2022.12( ISSN:0032-3861

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    New kind of polymer composites, i.e., co-continuous network polymers (CNP), were fabricated by the filling of the continuous pores of an epoxy monolith (EM) with a cross-linked acrylate polymer. The internal structures of EM and CNP were non-destructively observed by X-ray CT imaging. The mechanical properties of EM were highly dependent on the pore and epoxy frame sizes. Increasing the molar ratio of the amino groups to glycidyl groups during the monolith fabrication process created a coarser co-continuous structure. It greatly enhanced the stretching property of EM. Filling the pores of EM with a rubbery cross-linked acrylate polymer as the second component increased the maximum strength of CNP, independent of the pore size. Furthermore, the gap for-mation at the boundary between the hard phase and the soft phase of CNP was observed by X-ray CT imaging for the broken test piece used for a tensile test. We discussed a mechanism for the deformation and fracture of EM and CNP.

    DOI: 10.1016/j.polymer.2022.125433

  • Precise Control of Dismantlable Adhesion Property of Acrylate Copolymers Containing BOC-Protected Hydroxy Group

    T. Sakamoto, Y. Suzuki, and A. Matsumoto

    Polymer   262   125416   2022.12( ISSN:0032-3861

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    Publishing type:Research paper (scientific journal)  

    The acrylate copolymers consisting of 4-hydroxybutyl acrylate (HBA), 2-(tert-butoxy-carbonyloxy)ethyl acrylate (BHEA) or 4-(tert-butoxycarbonyloxy)butyl acrylate (BHBA), and 2-ethylhexyl acrylate (2EHA) as the repeating units were synthesized by radical copolymerization. The performance as the pressure-sensitive adhesives (PSAs) used for a dismantlable adhesion system was investigated. The glass transition temperatures and the adhesive properties were precisely controlled by the comonomer composition of the copolymers. It was confirmed that the deprotection of the tert-butoxycarbonyl (BOC) group rapidly proceeded for the BOC-containing acrylate copolymers as the PSAs. It resulted in the decrease of the adhesion strength during a debonding process by heating. The thermal stability during use and the quick response for on-demand debonding were simultaneously achieved by the use of alkyl p-toluenesulfonates as the thermally latent acids (TLAs).

    DOI: 10.1016/j.polymer.2022.125416

  • Relaxation and Amorphous Structure of Polymers Containing Rigid Fumarate Segments Reviewed

    Y. Suzuki, T. Kano, T. Tomii, N. Tsuji, and A. Matsumoto

    Polymers   14 ( 22 )   4876   2022.11

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    The physical properties of polymers are significantly affected by relaxation processes. Recently, we reported that poly(diethyl fumarate) (PDEF) shows two thermal anomalies on DSC measurement, despite the fact that it is a homopolymer. We attribute these two relaxations alpha relaxation and beta relaxation, respectively. In this study, we investigate the two relaxations of fumarate-containing polymers by DSC, solid-state NMR, and X-ray scattering. The two relaxations are present even in a copolymer of diethyl fumarate and ethyl acrylate with fumarate segments of 30%. We used poly(methyl methacrylate) (PMMA) as a model polymer for comparison, since there are detailed investigations of its dynamics and physical properties. Solid-state NMR indicates that the very local relaxation of poly(fumarate)s is not significantly different from that of PMMA. The tensile test showed that PDEF is still brittle at above beta relaxation temperature and below alpha relaxation temperature. It was revealed that a structural anisotropy appeared when PDEF was extended at around alpha relaxation temperature. We discuss the effect of the glassy packing of the rigid polymer chain including the DEF segments on the strong beta relaxation behavior. Our data provide insight into the microscopic mechanism of beta relaxation of vinyl polymers.

    DOI: 10.3390/polym14224876

    PubMed

  • Microscopic Structure Formation of Poly(methyl methacrylate) via Polymerization-Induced Phase Separation in the Presence of Poly(ethylene glycol) Reviewed

    Y. Suzuki, S. Onozato, Y. Shinagawa, and A. Matsumoto

    ACS Omega   7 ( 43 )   38933 - 38941   2022.10( ISSN:2470-1343

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    It has been demonstrated that nano- or micro-structured polymeric materials have huge potential as advanced materials. However, most of the current fabricating methods have limitations either in cost or in size. Here, we investigate the bulk polymerization of methyl methacrylate in the presence of poly(ethylene glycol) (PEG). We found that phase separation occurs during bulk polymerization. After removal of PEG via sonication, microscopic structures of poly(methyl methacrylate), including porous structures, co-continuous monolith structures, or particle aggregation structures, are formed. These structures can be controlled by the amount of PEG added and the reaction temperature. The results are summarized in phase diagrams. The addition of PEG significantly affects the reaction kinetics. Phase separation is coupled with the reaction acceleration known as the Trommsdorff effect. As a result, the reaction completes in a shorter time when the PEG amount is higher. We demonstrate surface coating to fabricate an amphiphobic surface, repelling both water and oil. The methods presented here have the potential to fabricate microscopic structures in large areas cost-effectively.

    DOI: 10.1021/acsomega.2c04690

    PubMed

  • バルク重合中の反応加速(トロムスドルフ効果)に関する新展開 Reviewed

    鈴木祥仁

    日本接着学会誌 雑誌   2022.04

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    Kind of work:Single Work  

  • Dielectric relaxation and glassy dynamics in poly(diisopropyl fumarate) and its copolymers with acrylate segments

    K. Miyata, J. Yoshioka, K. Fukao, Y. Suzuki, and A. Matsumoto

    POLYMER   245   124671   2022.04( ISSN:0032-3861

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    Dynamical behavior and glass transitions in copolymers of diisopropyl fumarate (DiPF) with 1-adamantyl acrylate (AdA) or n-butyl acrylate (nBA) are investigated by dielectric relaxation spectroscopy (DRS) to elucidate the effect of structural constraint due to the absence of a CH2 spacer on the dynamics. DRS measurements revealed that the two copolymers exhibit three dynamical processes: alpha-, beta-, and gamma-processes. The relaxation time of the beta-process can be described by the Vogel-Fulcher-Tammann (VFT) law in addition to the alpha-process. Hence, two glass transition temperatures, T-g, can be evaluated from alpha-and beta-processes. The AdA and nBA fraction dependence of T(g)s is consistent with that obtained by dynamical mechanical analysis. The Vogel temperature of the alpha-process is nearly equal to that of the beta-process for the PDiPF homopolymer. With the increase in the AdA fraction, the difference in the Vogel temperature between the alpha-and beta-processes increases. This result suggested that there is an intrinsic correlation between the alpha- and beta-processes for PDiPF, and the correlation changes with the AdA fraction. From the nBA fraction dependence of the beta-process, the beta-process of PDiPF can be related to the segmental motion of the main chain. Nevertheless, PDiPF exhibits a solid-like property up to the T-g, which is related to the alpha-process. The physical origins of other processes also were discussed.

    DOI: 10.1016/j.polymer.2022.124671

  • RAFT Polymerization of 2-(tert-Butoxycarbonyloxy)Ethyl Methacrylate and Transformation to Functional Polymers via Deprotection and the Subsequent Polymer Reactions

    Chu Jing, Kaito Osada, Chie Kojima, Yasuhito Suzuki, Akikazu Matsumoto

    MACROMOLECULAR CHEMISTRY AND PHYSICS   223 ( 1 )   2022.01( ISSN:1022-1352

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    Reversible addition-fragmentation chain transfer (RAFT) polymerization of 2-(tert-butoxycarbonyloxy)ethyl methacrylate (BHEMA) is carried out using 4-cyano-4-((dodecylsulfanylthiocarbonyl)sulfanyl)pentanoic acid as the RAFT agent. The polymers with a controlled molecular weight and polydispersity are produced when a large amount of the RAFT agent is used. The RAFT polymerization of isobutyl methacrylate is also carried out using poly(2-(tert-butoxycarbonyloxy)ethyl methacrylate) (PBHEMA) as the macro-RAFT agent in order to synthesize diblock copolymers with a narrow molecular weight distribution. It is revealed that the control of the polymerization of BHEMA is achieved under limited polymerization conditions. Then, the acid-catalyzed deprotection of tert-butoxycarbonyloxy groups of PBHEMA is performed in the presence of trifluoroacetic acid at room temperature to obtain polymers with a hydroxy group in the side chain. The hydroxy-containing polymers are further reacted with 2-isocyanatoethyl acrylate and methacrylate to synthesize precursor polymers used for a thermally curing system.

    DOI: 10.1002/macp.202100336

  • Co-continuous network polymers using epoxy monolith for the design of tough materials

    Ren Tominaga, Yukihiro Nishimura, Yasuhito Suzuki, Yoshihiro Takeda, Masaru Kotera, Akikazu Matsumoto

    Scientific Reports   11 ( 1 )   2021.12( ISSN:2045-2322

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    <title>Abstract</title>High-performance polymer materials that can exhibit distinguished mechanical properties have been developed based on material design considering energy dissipation by sacrificial bond dissociation. We now propose co-continuous network polymers (CNPs) for the design of tough polymer materials. CNP is a new composite material fabricated by filling the three-dimensionally continuous pores of a hard epoxy monolith with any cross-linked polymer having a low glass transition temperature (<italic>T</italic><sub>g</sub>). The structure and mechanical properties of the CNPs containing epoxy resins, thiol-ene thermosets, and polyacrylates as the low-<italic>T</italic><sub>g</sub> components were investigated by differential scanning calorimetry, dynamic mechanical analysis, tensile tests as well as scanning electron microscopic observations and non-destructive 3D X-ray imaging in order to clarify a mechanism for exhibiting an excellent strength and toughness. It has been demonstrated that the mechanical properties and fractural behavior of the CNPs significantly depend on the network structure of the filler polymers, and that a simultaneous high strength and toughness are achieved via the sacrificial fracture mechanism of epoxy-based hard materials with co-continuous network structures.

    DOI: 10.1038/s41598-021-80978-2

    PubMed

    Other URL: http://www.nature.com/articles/s41598-021-80978-2

  • チオール変性ランダム型シルセスキオキサンとN-アリルマレイミド共重合体のチオール-エン反応による耐熱透明ポリマー材料の設計 Reviewed

    山本紘希, 鈴木祥仁, 松本章一

    ネットワークポリマー論文集 雑誌   2021.11

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    Kind of work:Joint Work  

  • Controlled deprotection of poly(2-(tert-butoxycarbonyloxy)ethyl methacrylate) using p-toluenesulfonic esters as thermally latent acid catalysts Reviewed

    Kaito Osada, Ryotaro Akahori, Yasuhito Suzuki, Akikazu Matsumoto

    POLYMER DEGRADATION AND STABILITY   205   110127   2021.11( ISSN:0141-3910

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    Poly(2-(tert-butoxycarbonyloxy)ethyl methacrylate) (PBHEMA) is converted to poly(2-hydroxyethyl methacrylate) with the release of isobutene and carbon dioxide gasses when it is heated at a high temperature over 200 degrees C. The deprotection of PBHEMA is accelerated by the addition of an acid, but it is simultaneously disadvantageous for the storage and handling of the polymer at an ambient temperature. In this study, we propose the use of thermal acid generators, i.e., thermally latent acids (TLAs) as the catalysts to control a reaction rate and a working temperature for the deprotection of PBHEMA. We investigated the thermal deprotection behavior of some sulfonates including isopropyl p-toluenesulfonate (IPTS) and cyclohexyl p-toluenesulfonate (CHTS). The kinetic parameters for the deprotection, which provides p-toluenesulfonic acid (TsOH) as the reaction product, were determined by thermogravimetric (TG) analysis under the isothermal condition. A remarkable autocatalytic effect actually resulted in a rapid deprotection to produce TsOH in a narrow temperature range under the non-isothermal conditions. The additive effect of the TLAs on the deprotection of the BOC groups contained in the side chain of PBHEMA was similarly investigated. It was revealed that the deprotection of PBHEMA rapidly proceeded by the addition of IPTS and CHTS under the heating conditions over 100 degrees C. PBHEMA was stable at a temperature below the onset temperature of the deprotection of the TLAs. The deprotection kinetics of PBHEMA and a detailed mechanism for the control of the reactions in the presence of the TLAs were clarified.

    DOI: 10.1016/j.polymdegradstab.2022.110127

  • Bulk polymerization kinetics of methyl methacrylate at broad temperature range investigated by differential scanning calorimetry Reviewed

    Y. Suzuki, R. Mishima, and A. Matsumoto

    Int. J. Chem. Kinet.   54 ( 6 )   361 - 370   2021.11( ISSN:0538-8066

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    Bulk polymerization directly provides glassy polymers from liquid monomers and has been used for many engineering applications. Recently, it has drawn attention for potential use as a resin for fiber-reinforced plastics and additive manufacturing. For such applications, detailed and precise information of the reaction kinetics, including non-ideal conditions, is required. Here, we investigate the reaction kinetics of isothermal bulk polymerization using differential scanning calorimetry (DSC) at a broad temperature ranged from 40 degrees C to 90 degrees C. 2,2'-Azobis(isobutyronitrile) (AIBN) or 2,2'-Azobis(4-methoxy-2,4-dimethylvaleronitrile) (V-70) is used as an initiator. We analyze the data focusing on the onset of sudden reaction acceleration known as Trommsdorff effect. Because of the reaction kinetics and the nature of Trommsdorff effect, a higher temperature does not always lead to a shorter time for the completion of the reaction. We discuss the reaction kinetics in conjunction with the molecular weight distributions.

    DOI: 10.1002/kin.21564

  • Characteristic Features of α and β Relaxations of Poly(diethyl fumarate) as the Poly(substituted methylene)

    Yasuhito Suzuki, Nagisa Tsuji, Kairi Miyata, Takahito Kano, Koji Fukao, Akikazu Matsumoto

    Macromolecular Chemistry and Physics   222 ( 16 )   2100124 - 2100124   2021.07( ISSN:1022-1352

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    Recently the beta relaxation draws attention because it may act as a precursor of the alpha relaxation and potentially influences a wide range of properties. In many cases, the weak intensity of the beta relaxation limits the experimental investigation. Herein, the beta relaxation of poly(diethyl fumarate) (PDEF) using differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and dielectric spectroscopy is investigated. Originating from the absence of methylene spacer in the main chain, polyfumarates possess an intense beta relaxation. Unlike common vinyl polymers, PDEF shows two distinct steps in DSC measurement corresponding to alpha and beta relaxations. Interestingly, the relative intensities of alpha and beta relaxations depend on the thermal history. The beta relaxation of PDEF obtained by dielectric spectroscopy at high temperature is similar to that of poly(methyl methacrylate) (PMMA). However, the beta relaxation of PDEF follows the VFT equation rather than the Arrhenius equation at low temperatures. The analysis of PDEF/PMMA blend suggests the local orientation of PDEF chain plays a vital role in the intense beta relaxation.

    DOI: 10.1002/macp.202100124

    Other URL: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/macp.202100124

  • Polymerization-Induced Vitrification and Kinetic Heterogenization at the Onset of the Trommsdorff Effect

    Yasuhito Suzuki, Yuya Shinagawa, Eri Kato, Ryutaro Mishima, Koji Fukao, Akikazu Matsumoto

    MACROMOLECULES   54 ( 7 )   3293 - 3303   2021.04( ISSN:0024-9297

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    The reaction kinetics during bulk free radical polymerization is still not fully understood. As the reaction proceeds, many parameters, including monomer/polymer fraction, radical concentration, viscosity, and temperature, change in a non-equilibrium manner. In this study, we investigate the bulk polymerization of methyl methacrylate, focusing on a sudden acceleration in reaction kinetics known as the Trommsdorff effect. Dielectric spectroscopy shows that a temperature increase occurs at the vicinity of polymerization-induced vitrification. At the same timing as the temperature increase, the polymerization solution becomes heterogeneous. This heterogenization causes a decrease in transmittance at a wavelength of 400 nm. We discuss phenomena related to the Trommsdorff effect, including the kinetic heterogenization, vitrification, change in the amorphous structure, and the formation of discontinuously high-molecular-weight polymers.

    DOI: 10.1021/acs.macromol.0c02260

  • Co-continuous Network Polymers Using Epoxy Monolith for the Design of Tough Materials Reviewed

    R. Tominaga, Y. Nishimura, Y. Suzuki, Y. Takeda, M. Kotera, and A. Matsumoto

    Scientific reports 雑誌   2021.01

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    Kind of work:Joint Work  

  • Interfacial Structure Control and Three-Dimensional X-ray Imaging of an Epoxy Monolith Bonding System with Surface Modification Reviewed

    Nanako Sakata, Yoshihiro Takeda, Masaru Kotera, Yasuhito Suzuki, Akikazu Matsumoto

    Langmuir   36 ( 37 )   10923 - 10932   2020.09( ISSN:0743-7463

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    Copyright © 2020 American Chemical Society. A monolith bonding system has a high reliability for dissimilar material bonding. The epoxy monolith layer fabricated on a substrate guarantees bond strength by the anchor effect, regardless of the compatibility of the used materials. Designing a high-performance monolith bonding system requires the suppression of an interfacial failure between the monolith and the substrate. In this study, silane and phosphine coupling agents containing amino and epoxy groups were used to construct a robust interfacial structure between the monolith and the substrates such as glass and metals. The internal and interfacial monolith structures were characterized by three-dimensional X-ray imaging as a nondestructive observation method in addition to the scanning electron microscopy of the sample cross sections. The modification of the substrate-monolith interface using the coupling agents improved the strength of dissimilar material bonding of the glass and metal substrates in combination with thermoplastic resins such as poly(ethylene terephthalate) and polycarbonate bisphenol-A.

    DOI: 10.1021/acs.langmuir.0c01481

    PubMed

  • Interfacial Structure Control and Three-Dimensional X-ray Imaging of an Epoxy Monolith Bonding System with Surface Modification

    N. Sakata, Y. Takeda, M. Kotera, Y. Suzuki, A. Matsumoto

    Langmuir   2020.08

  • One-shot Radical Polymerization of Conjugated and Non-conjugated Monomers Accompanying Spontaneous Delay of Polymerization for the Synthesis of Double Network Hydrogels

    S. Dohi, Y. Suzuki, A. Matsumoto

    Polym. Int.   2020.05

  • Relaxation behavior of poly(diisopropyl fumarate) including no methylene spacer in the main chain Reviewed

    Yasuhito Suzuki, Kairi Miyata, Masashi Sato, Nagisa Tsuji, Koji Fukao, Akikazu Matsumoto

    Polymer   196   122479 - 122479   2020.05( ISSN:0032-3861

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    © 2020 Elsevier Ltd Poly(diisopropyl fumarate) (PDiPF) has dynamic mechanical properties different from the relaxation processes of conventional vinyl polymers, due to the absence of a methylene spacer in the main chain. In this study, we investigated the relaxation behavior of PDiPF using dielectric spectroscopy (DS), differential scanning calorimetry (DSC), wide angle X-ray scattering (WAXS), and dynamic mechanical analysis (DMA). We have demonstrated that the β relaxation of PDiPF has unusual characteristics originating from the absence of a methylene spacer; for example, the β relaxation of PDiPF follows the Vogel–Fulcher–Tammann (VFT) equation, causes a clear step in the DSC curve, and enhances the microscopic packing of the polymer chains in the solid state. These β relaxation behaviors of PDiPF reflect the enlarged cooperative rearranging region (CRR).

    DOI: 10.1016/j.polymer.2020.122479

  • Synthesis of Heat‐resistant Polymers by Thiol–Ene Reaction of N ‐Allylmaleimide Copolymers Using Glycoluril Crosslinkers with Rigid Molecular Structures Reviewed

    Yuto Kurasaki, Yasuhito Suzuki, Akikazu Matsumoto

    Journal of Polymer Science   58 ( 7 )   923 - 931   2020.04( ISSN:2642-4150

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    © 2020 Wiley Periodicals, Inc. We carried out the thermal curing of the copolymers of N-allylmaleimide (AMI) and 2-ethylhexyl acrylate (2EHA) using 1,3,4,6-tetra(2-mercaproethyl)glycoluril (G1), 1,3,4,6-tetra(3-mercaptopropyl)glycoluril (G2), 1,3,4,6-tetraallylglycoluril (G3), triallylisocyanurate (TAIC), and pentaerythritol tetrakis(3-mercaptobutyrate) (PEMB) as the crosslinkers. Based on the results for the analysis of thiol–ene reactions monitored by IR spectroscopy, it was confirmed that the curing rate significantly depended on the combination of the used crosslinkers. The insoluble fraction after curing was more than 90% for the systems using the glycoluril crosslinkers, while the conversion of the allyl groups was suppressed due to the rigid structure of these crosslinkers. The heat resistance and the mechanical properties of the crosslinked polymers were investigated by thermogravimetric analysis, differential scanning calorimetry, dynamic mechanical analysis, and mechanical tensile tests. For the products cured using the glycoluril crosslinkers, the glass transition temperature (Tg) and the maximum temperature of thermal decomposition (Tmax) were 54–59 °C and 395–409 °C, respectively, being higher than those for the cured product prepared with PEMB and TAIC as the conventional crosslinkers. The elasticity (75–139 MPa), the maximum strength (3.0–4.1 MPa), and the adhesion strength (6.7–10.7 MPa) for the polymers cured with the glycoluril crosslinkers, determined by the mechanical tensile and single lap-shear adhesion tests, were higher than those for cured materials produced with PEMB. Thus, the thermal and mechanical properties of the maleimide copolymers were efficiently enhanced by crosslinking using the rigid glycoluril compounds. © 2020 Wiley Periodicals, Inc. J. Polym. Sci. 2020, 58, 923–931.

    DOI: 10.1002/pol.20190188

    Other URL: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/pol.20190188

  • 種々のエポキシ樹脂とジアミン硬化剤から得られるエポキシモノリスを用いた金属樹脂接合の耐熱性評価 Reviewed

    杉本由佳, 鈴木祥仁, 松本章一

    日本接着学会誌 雑誌   2020

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  • Relaxation Behavior of Poly(diisopropyl fumarate) Including No Methylene Spacer in the Main Chain Reviewed

    Y. Suzuki, K. Miyata, M. Sato, N. Tsuji, K. Fukao, and A. Matsumoto

    2020

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  • 細胞内での液体ー液体相分離

    鈴木祥仁

    化学工学   2020

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  • エーテル結合を含む多官能チオール架橋剤を用いたN-アリルマレイミド共重合体熱硬化物の特性解析

    倉崎佑斗, 鈴木祥仁, 松本章一

    ネットワークポリマー論文集 雑誌   2020

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  • One-Shot Preparation of Polyacrylamide/Poly(sodium styrenesulfonate) Double-Network Hydrogels for Rapid Optical Tissue Clearing Reviewed

    Koda, Takayuki, Dohi, Shunsuke, Tachi, Hedeki, Suzuki, Yasuhito, Kojima, Chie, Matsumoto, Akikazu

    ACS OMEGA   4 ( 25 )   21083 - 21090   2019.12( ISSN:2470-1343

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    In this study, we propose a convenient method for the synthesis of double-network gels by the one-shot radical polymerization for their application to rapid optical tissue clearing. Double-network gels were produced during the radical polymerization of acrylamide (AAm) and sodium styrenesulfonate (SS) in the presence of N,N'-methylenebisacrylamide and sodium divinylbenzenesulfonate as the cross-linkers by simultaneous addition, that is, one-shot polymerization accompanying the delay of polymerization for a second network monomer. We analyzed the polymerization process based on the consumption rates of each monomer during the reactions in the absence of the cross-linkers in order to estimate the repeating unit structure of the resulting polymers. We then fabricated the AAm/SS gels by the polymerization of AAm and SS in the presence of the cross-linkers. We analyzed the swelling, viscoelastic, and mechanical properties of the produced gels to investigate their network structure. Finally, we demonstrated the validity of the double-network gels for the application to rapid optical tissue clearing.

    DOI: 10.1021/acsomega.9b02493

  • Adamantane-containing poly(dialkyl fumarate)s with rigid chain structures Reviewed

    Tsuji, Nagisa, Suzuki, Yasuhito, Matsumoto, Akikazu

    POLYMER JOURNAL   51 ( 11 )   1147 - 1161   2019.11( ISSN:0032-3896

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    Four dialkyl fumarates containing bulky adamantyl ester groups, i.e., di(1-adamantyl) fumarate (1), bis(3,5-dimethyl-1-adamantyl) fumarate (2), 1-adamantyl isopropyl fumarate (3), and 3,5-dimethyl-1-adamantyl isopropyl fumarate (4), were polymerized to obtain poly( dialkyl fumarate)s (PDRFs) with rigid chain structures. We carried out the conventional radical polymerization of these adamantane-containing DRFs in the presence of a radical initiator either in toluene or in bulk at 80 or 60 degrees C. Reversible addition-fragmentation chain transfer (RAFT) polymerization was also performed using 1,1'-(1,2ethanediyl) bis[2-[[(dodecylthio)thioxymethyl]thio]-2-methylpropionate] and 2,2,2-trifluoroethyl 2-[[(dodecylthio)thioxymethyl]thio]-2-methylpropionate as the chain transfer agents (CTAs). Triblock copolymers consisting of rigid and flexible segments were synthesized by the polymerization of 2-ethylhexyl acrylate, which was used as the second monomer, using the PDRFs as the macro-CTA containing trithiocarbonate groups at the chain ends. The excellent thermal stability of the adamantane-containing PDRFs was confirmed by thermogravimetric analysis in a nitrogen stream. The alignment of the rigid PDRF chains in the solid-state was revealed based on the appearance of a peak in the small angle regions of the X-ray diffraction profiles.

    DOI: 10.1038/s41428-019-0228-x

  • Relaxation behavior of random copolymers containing rigid fumarate and flexible acrylate segments by dynamic mechanical analysis Reviewed

    Suzuki, Yasuhito, Tsujimura, Tomoya, Funamoto, Kenji, Matsumoto, Akikazu

    POLYMER JOURNAL   51 ( 11 )   1163 - 1172   2019.11( ISSN:0032-3896

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    Due to the absence of a methylene spacer in the main chain, poly(substituted methylene)s with rigid structures possess some distinguished properties including a unique beta-relaxation process. In this study, two series of random copolymers of diisopropyl fumarate (DiPF) with 1-adamantyl acrylate (AdA) and n-butyl acrylate (nBA) with various compositions were synthesized. The relaxation behavior of the copolymers was investigated using dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC). The alpha-relaxation temperature of the copolymers decreased as the acrylate content increased. Depending on the glass transition temperature (T-g) of the counterpart copolymers, that is, T-g = 156 degrees C for the homopolymer of AdA and T-g = -53 degrees C for the homopolymer of nBA, the beta-relaxation temperature from the DiPF segments systematically shifted. While the beta-relaxation temperature increased when copolymerized with AdA, the temperature decreased when copolymerized with nBA. Both copolymers maintained a high storage modulus of more than 10MPa in the range between the alpha- and ss-relaxation temperatures. The merging of the alpha and beta processes at an intermediate composition was also observed. The random copolymerization of DiPF and acrylates enables us to fine tune the properties associated with the beta-relaxation of DiPF segments.

    DOI: 10.1038/s41428-019-0226-z

  • Infusible acrylic thermoplastic resins: Tailoring of chemorheological properties Reviewed

    Cousins, Dylan S., Howell, Jackson, Suzuki, Yasuhito, Samaniuk, Joseph R., Stebner, Aaron P., Dorgan, John R.

    JOURNAL OF APPLIED POLYMER SCIENCE   136 ( 40 )   2019.10( ISSN:0021-8995

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    Infusible liquid resins that polymerize into a thermoplastic are desirable for many applications. Similar to unsaturated and vinylester thermosetting systems, they consist of polymers dissolved in reactive monomer. This work presents a method to decrease cycle time by tuning the molecular weight and concentration of the predissolved polymer in the resin. Variation of these properties allows precise control of the viscosity which in turn controls the time at which peak exotherm is reached, the maximum temperature for a given part thickness, and cure time. Predictive models for the viscosity dependence on molecular weight, polymer concentration, shear rate, and temperature are developed. Two fiberglass panels are fabricated and tested; one with a lower molecular weight (M-w similar to 30 kg mol(-1)) poly(methyl methacrylate) dissolved in methyl methacrylate and the second with higher molecular weight (M-w similar to 500 kg mol(-1)) predissolved polymer in the resin. Mechanical properties are indistinguishable but the lower molecular weight panel cures up to three times faster. (c) 2019 Wiley Periodicals, Inc.

    DOI: 10.1002/app.48006

  • Thermal decomposition of methacrylate polymers containing tert-butoxycarbonyl moiety Reviewed

    Jing, Chu, Suzuki, Yasuhito, Matsumoto, Akikazu

    POLYMER DEGRADATION AND STABILITY   166   145 - 154   2019.08( ISSN:0141-3910

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    In organic synthesis and polymer materials chemistry, a tert-butoxycarbonyl (BOC) group is often used as one of tools for the protection of functional groups. In this study, we carried out radical polymerization of 2-(tert-butoxycarbonyloxy)ethyl methacrylate (BHEMA) and copolymerizations of BHEMA with methyl methacrylate (MMA), n-butyl methacrylate (nBMA), isobutyl methacrylate (iBMA), tert-butyl methacrylate (tBMA), dodecyl methacrylate (DMA), alpha-methylstyrene (AMS), and limonene (Lim) as the 1,1-disubstituted ethylene monomers and investigated the thermal decomposition behavior of the obtained polymers. On the basis of the results of thermogravimetric (TG) analysis in nitrogen at the heating rate of 10 degrees C/min, it was revealed that the deprotection of the BOC group in the polymer side chains occurred at ca. 200 degrees C accompanying the quantitative elimination of isobutene and carbon dioxide, independent of the structures of the repeating units. The following main-chain decomposition of the residual copolymers resulted in a small amount of residue less than 1% at 500 degrees C. Poly(2-hydroxyethyl methacrylate) was synthesized via the deprotection of the BOC group of PBHEMA. (C) 2019 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.polymdegradstab.2019.05.027

  • Adamantane-containing poly (dialkyl fumarate) s with rigid chain structures

    Nagisa Tsuji, Yasuhito Suzuki, Akikazu Matsumoto

    Polymer Journal   2019.07

  • Relaxation behavior of random copolymers containing rigid fumarate and flexible acrylate segments by dynamic mechanical analysis Reviewed

    Yasuhito Suzuki, Tomoya Tsujimura, Kenji Funamoto, Akikazu Matsumoto

    Polymer Journal   2019.07

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  • Dual-energy X-ray computed tomography for void detection in fiber-reinforced composites Reviewed

    Suzuki, Yasuhito, Cousins, Dylan S., Dorgan, John R., Stebner, Aaron P., Kappes, Branden B.

    JOURNAL OF COMPOSITE MATERIALS   53 ( 17 )   2349 - 2359   2019.07( ISSN:0021-9983

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    Void detection in fiber-reinforced composites traditionally relies on precise density measurements before and after the physical removal of the polymer matrix; consequently, this method only provides data on the total volume of voids within the material without information about void sizes, shapes, and distributions. Despite advances in X-ray computed tomography, it is still challenging to quantitatively and convincingly characterize void content due to the complex X-ray physics of divergent, broad-spectrum laboratory X-ray sources. Here, we demonstrate that by using aligned high-energy and low-energy X-rays, dual-energy X-ray computed tomography provides high-quality images and phase-based segmentation that allows for clear distinction between air, polymer matrix, and reinforcing fibers. We verify the method on several fiber-reinforced composite samples: epoxy-glass fiber composites fabricated by vacuum-assisted resin transfer molding and by light resin transfer molding (light resin transfer molding), and a carbon fiber composite fabricated via vacuum-assisted resin transfer molding.

    DOI: 10.1177/0021998319827091

  • Manufacturing and Flexural Characterization of Infusion-Reacted Thermoplastic Wind Turbine Blade Subcomponents

    Robynne E. Murray, Dayakar Penumadu, Dylan Cousins, Ryan Beach, David Snowberg, Derek Berry, Yasuhito Suzuki, Aaron Stebner

    APPLIED COMPOSITE MATERIALS   26 ( 3 )   945 - 961   2019.06( ISSN:0929-189X

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    Reactive thermoplastics are advantageous for wind turbine blades because they are recyclable at end of life, have reduced manufacturing costs, and enable thermal joining and shaping. However, there are challenges with manufacturing wind components from these new materials. This work outlines the development of manufacturing processes for a thick glass fiber-reinforced acrylic thermoplastic resin wind turbine blade spar cap, with consideration given to effects of the exothermic curing reaction on thick composite parts. Comparative elastic properties of these infusible thermoplastic materials with epoxy thermoset materials, as well as thermoplastic coupon components, are also included. Based on the results of this study it is concluded that the thermoplastic resin system is a viable candidate for the manufacturing of wind turbine blades using vacuum-assisted resin transfer molding. Significant gains in energy savings are realized avoiding heated molds, ability for recycling, and providing an opportunity for utilizing thermal welding.

    DOI: 10.1007/s10443-019-9760-2

  • Phase separation during bulk polymerization of methyl methacrylate

    Yasuhito Suzuki, Dylan S Cousins, Yuya Shinagawa, Robert T Bell, Akikazu Matsumoto, Aaron P Stebner

    2019.04

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  • Phase separation during bulk polymerization of methyl methacrylate Reviewed

    Suzuki, Yasuhito, Cousins, Dylan S., Shinagawa, Yuya, Bell, Robert T., Matsumoto, Akikazu, Stebner, Aaron P.

    POLYMER JOURNAL   51 ( 4 )   423 - 431   2019.04( ISSN:0032-3896

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    We report on the phase separation of methyl methacrylate (MMA) and poly(methyl methacrylate) (PMMA) during bulk free-radical polymerization. The phase separation is induced when the reaction is initiated at room temperature by the redox reaction of benzoyl peroxide in the presence of an amine. During the reaction, the ratio of MMA and PMMA changes continuously. Separation into MMA-rich and PMMA-rich phases coincides with the onset of the Trommsdorff effect. At room temperature, the interface between the two phases remains, even after drying the remaining monomer. When the sample is annealed above the glass transition temperature T-g, the interface disappears. Due to the frozen dynamics of the polymer chains, subsequent cooling below T-g does not result in further phase separation. This result provides evidence for the existence of rich, thermodynamically stable states, which are typically suppressed due to the frozen dynamics of polymers at temperatures below the T-g, after thermal processing above the T-g.

    DOI: 10.1038/s41428-018-0142-7

  • Styrene-Free, Partially Biobased Resin System for Thermoplastic Composites. I. Rheological Properties and Preliminary Panel Fabrication Reviewed

    Cousins, Dylan S., Tan, Bin, Howell, Jackson, Suzuki, Yasuhito, Samaniuk, Joseph R., Knauss, Daniel M., Dorgan, John R.

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   7 ( 7 )   6512 - 6521   2019.04( ISSN:2168-0485

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    For the first time ever, a styrene-free, biobased formulation suitable for infusion processing of thermoplastic composites is reported. Biobased polylactide (PLA) is soluble in methyl methacrylate (MMA) and this new styrene free system is suitable for fabricating composite parts. Rheology is critically important in transfer molding; therefore, single chain properties are related to concentrated solutions of PLA in MMA. Multiple angle laser light scattering (MALLS) provides molecular weights, radii of gyration, and second virial coefficients for PLAs of varying molecular weight dissolved in MMA. The Flory interaction parameter is described by chi = 0.40 +/- 0.04. Dilute solution viscometry (DSV) gives the Mark-Houwink relationship at 30 degrees C as [eta] = 0.017M(eta)(0.73). The expansion factors calculated from DSV and MALLS agree reasonably well (alpha = 1.45 +/- 0.25). The values of a, chi, and alpha indicate that MMA is a good solvent for PLA. The Carreau Yasuda viscosity and Andrade-Eyring temperature models enable a quantitative description of the specific viscosity, eta(sp), as a function of the intrinsic viscosity normalized concentration, c[eta]. The quantitative description provides a powerful and generally applicable approach to formulating resins useful for composite fabrication. A new environmentally superior resin system is used to fabricate a composite panel using vacuum-assisted resin transfer molding.

    DOI: 10.1021/acssuschemeng.8b04229

  • Infusible acrylic thermoplastic resins: Tailoring of chemorheological properties

    Dylan S Cousins, Jackson Howell, Yasuhito Suzuki, Joseph R Samaniuk, Aaron P Stebner, John R Dorgan

    Journal of Applied Polymer Science   2019.03

  • Dual-energy X-ray computed tomography for void detection in fiber-reinforced composites

    Yasuhito Suzuki, Dylan S Cousins, John R Dorgan, Aaron P Stebner, Branden B Kappes

    Journal of Composite Materials   2019.02

  • Styrene-Free, Partially Biobased Resin System for Thermoplastic Composites. I. Rheological Properties and Preliminary Panel Fabrication

    Dylan S Cousins, Bin Tan, Jackson Howell, Yasuhito Suzuki, Joseph R Samaniuk, Daniel M Knauss, John R Dorgan

    ACS Sustainable Chemistry & Engineering   2019.02

  • Recycling glass fiber thermoplastic composites from wind turbine blades Reviewed

    Cousins, Dylan S., Suzuki, Yasuhito, Murray, Robynne E., Samaniuk, Joseph R., Stebner, Aaron P.

    JOURNAL OF CLEANER PRODUCTION   209   1252 - 1263   2019.02( ISSN:0959-6526

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    Thermoplastic resin systems have long been discussed for use in large-scale composite parts but have yet to be exploited by the energy industry. The use of these resins versus their thermosetting counterparts can potentially introduce cost savings due to non-heated tooling, shorter manufacturing cycle times, and recovery of raw materials from the retired part. Because composite parts have high embedded energy, recovery of their constituent materials can provide substantial economic benefit. This study determines the feasibility of recycling composite wind turbine blade components that are fabricated with glass fiber reinforced Elium (R) thermoplastic resin. Several experiments are conducted to tabulate important material properties that are relevant to recycling, including thermal degradation, grinding, and dissolution of the polymer matrix to recover the constituent materials. Dissolution, which is a process unique to thermoplastic matrices, allows recovery of both the polymer matrix and full-length glass fibers, which maintain their stiffness (190 N/(mm g)) and strength (160 N/g) through the recovery process. Injection molded regrind material is stiffer (12 GPa compared to 10 GPa) and stronger (150 MPa compared to 84 MPa) than virgin material that had shorter fibers. An economic analysis of the technical data shows that recycling thermoplastic-glass fiber composites via dissolution into their constituent parts is commercially feasible under certain conditions. This analysis concludes that 50% of the glass fiber must be recovered and resold for a price of $0.28/kg. Additionally, 90% of the resin must be recovered and resold at a price of $2.50/kg. (C) 2018 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.jclepro.2018.10.286

  • Synthesis of Transparent and Heat-Resistant Acrylic Block Copolymers by Living Radical Polymerization

    Kohei Takada, Nagisa Tsui, Yasuhito Suzuki, Akikazu Matsumoto

    KOBUNSHI RONBUNSHU   2019.01

  • リビングラジカル重合による透明耐熱アクリル系ブロック共重合体の合成 Reviewed

    髙田康平,辻 渚,鈴木祥仁,松本章一

    高分子論文集 雑誌   2019

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  • Design of a High-Performance Dismantlable Adhesion System Using Pressure-Sensitive Adhesive Copolymers of 2-Hydroxyethyl Acrylate Protected with tert-Butoxycarbonyl Group in the Presence of Cross-Linker and Lewis Acid

    Masashi IsekiYasuhito SuzukiHideki TachiAkikazu Matsumoto*

    ACS Omega   2018.11

  • Kinetics and temperature evolution during the bulk polymerization of methyl methacrylate for vacuum-assisted resin transfer molding

    Yasuhito Suzuki, Dylan Cousins, Jerred Wassgren, Branden B Kappes, John Dorgan, Aaron P Stebner

    Composites Part A: Applied Science and Manufacturing   2018.01

  • Capillary Imbibition, Crystallization, and Local Dynamics of Hyperbranched Poly (ethylene oxide) Confined to Nanoporous Alumina

    Yang Yao, Yasuhito Suzuki, Jan Seiwert, Martin Steinhart, Holger Frey, Hans-Jürgen Butt, George Floudas

    Macromolecules   2017.10

  • Crystallinity tunes permeability of polymer nanocapsules

    Isabel Schlegel, Rafael Muñoz-Espí, Patricia Renz, Ingo Lieberwirth, George Floudas, Yasuhito Suzuki, Daniel Crespy, Katharina Landfester

    Macromolecules   2017.06

  • Photoswitching of glass transition temperatures of azobenzene-containing polymers induces reversible solid-to-liquid transitions

    Hongwei Zhou, Changguo Xue, Philipp Weis, Yasuhito Suzuki, Shilin Huang, Kaloian Koynov, Günter K Auernhammer, Rüdiger Berger, Hans-Jürgen Butt, Si Wu

    Nature Chemistry   2017.02

  • Effects of polydispersity, additives, impurities and surfaces on the crystallization of poly (ethylene oxide)(PEO) confined to nanoporous alumina Reviewed

    Yasuhito Suzuki, Martin Steinhart, Michael Kappl, Hans-Jürgen Butt, George Floudas

    Polymer 雑誌   2016.09

  • Dynamics of ice/water confined in nanoporous alumina

    Yasuhito Suzuki, Martin Steinhart, Robert Graf, Hans-Jürgen Butt, George Floudas

    The Journal of Physical Chemistry B   2015.11

  • Kinetics of ice nucleation confined in nanoporous alumina

    Yasuhito Suzuki, Martin Steinhart, Hans-Jürgen Butt, George Floudas

    The Journal of Physical Chemistry B   2015.08

  • Homogeneous nucleation of predominantly cubic ice confined in nanoporous alumina

    Yasuhito Suzuki, Hatice Duran, Martin Steinhart, Michael Kappl, Hans-Jürgen Butt, George Floudas

    Nano letters   2015.02

  • Real time ligand-induced motion mappings of AChBP and nAChR using X-ray single molecule tracking

    Hiroshi Sekiguchi, Yasuhito Suzuki, Yuri Nishino, Suzuko Kobayashi, Yoshiko Shimoyama, Weiyan Cai, Kenji Nagata, Masato Okada, Kouhei Ichiyanagi, Noboru Ohta, Naoto Yagi, Atsuo Miyazawa, Tai Kubo, Yuji C Sasaki

    Scientific reports   2014.09

  • Suppression of Poly(ethylene oxide) Crystallization in Diblock Copolymers of Poly(ethylene oxide)-b-poly(ε-caprolactone) Confined to Nanoporous Alumina

    Yasuhito Suzuki, Hatice Duran, Martin Steinhart, Hans-Jürgen Butt, George Floudas

    Macromolecules   2014.02

  • Multiple nucleation events and local dynamics of poly (ε-caprolactone)(PCL) confined to nanoporous alumina

    Yasuhito Suzuki, Hatice Duran, Wajiha Akram, Martin Steinhart, George Floudas, Hans-Jürgen Butt

    Soft Matter   2013

  • Homogeneous crystallization and local dynamics of poly (ethylene oxide)(PEO) confined to nanoporous alumina

    Yasuhito Suzuki, Hatice Duran, Martin Steinhart, Hans-Jürgen Butt, George Floudas

    Soft Matter   2013

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Books and Other Publications

  • ブット・グラフ・カペル 界面の物理と化学

    鈴木祥仁、 深尾浩次(共訳)( Role: Joint author)

    丸善出版  2016.10 

MISC

  • Polymerization induced phase separation of methyl methacrylate and Trommsdorff effect

    Yasuhito Suzuki, Yuya Shinagawa, Koji Fukao, Akikazu Matsumoto

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   258   2019.08( ISSN:0065-7727

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    Publishing type:Research paper, summary (international conference)  

Presentations

  • エポキシモノリスと共連続ネットワークポリマの引張および圧縮変形機構 Domestic conference

    荒岸和真,鈴木祥仁,松本章一

    第19回日本接着学会関西支部若手の会  2023.12 

  • ポリマーブラシ側鎖官能基の保護脱保護を利用した表面濡れ性の制御 Domestic conference

    松並杏友加,鈴木祥仁,森藤日菜,佐藤和郎,金岡祐介,松本章一

    第19回日本接着学会関西支部若手の会  2023.12 

  • マレイミドオキサジンと多官能チオールを用いる熱硬化物の合成と熱および機械特性評価 Domestic conference

    高須美菜子,杉浦幹太,杉本早紀,鈴木祥仁,松本章一

    第72回ネットワークポリマー講演討論会  2023.10 

  • エポキシモノリスの引張および圧縮変形機構の解析 Domestic conference

    荒岸和真,鈴木祥仁,武田佳彦,松本章一

    第72回ネットワークポリマー講演討論会  2023.10 

  • ポリマーブラシ側鎖官能基の保護脱保護を利用した親水性度の制御 Domestic conference

    松並杏友加,森藤日菜,鈴木祥仁,松本章一

    第72回高分子討論会  2023.09 

  • メタクリル酸メチルの重合誘起相分離による構造形成過程 Domestic conference

    小野里勝大,鈴木祥仁,松本章一

    第72回高分子討論会  2023.09 

  • ポリ置換メチレン構造を有するポリフマル酸エステルの構造制御と機能化 Domestic conference

    石丸諒太郎,鈴木祥仁,松本章一

    第72回高分子討論会  2023.09 

  • The Relationship between Polymerization-Induced Heterogeneity and the Reaction Acceleration during the Late Stage of Bulk Polymerization Domestic conference

    2023.09 

  • Polymerization-Induced Heterogenization, Phase Separation, and Reaction Acceleration at the Vicinity of Vitrification upon Curing of Thermoplastic Resins International conference

    Y. Suzuki, A. Matsumoto

    14th European Adhesion Conference & 7th World Congress on Adhesion and Related Phenomena (EURADH/WCARP 2023)  2023.09 

  • Dynamics, Amorphous Structure, and Chemical Reaction Kinetics at the Vicinity of Polymerization-Induced Vitrification Invited International conference

    Y. Suzuki, A. Matsumoto

    9th International Discussion Meeting on Relaxations in Complex Systems (9IDMRCS)  2023.08 

  • Stretching and Compression Deformation Mechanism of Epoxy Monolith and Co-continuous Network Polymers International conference

    2023.07 

  • メチレンスペーサーを持たないポリクロトン酸エステルの緩和挙動 Domestic conference

    岩上幸祐,鈴木祥仁,松本章一

    第69回高分子研究発表会(神戸)  2023.07 

  • BOC基保護ポリメタクリル酸2-ヒドロキシエチルブラシを用いた表面パターンの作製と評価 Domestic conference

    森藤日菜,松並杏友加,鈴木祥仁,松本章一

    第69回高分子研究発表会(神戸)  2023.07 

  • BOC基含有ポリマーを用いた熱応答型の易解体性エポキシ接着材料の設計 Domestic conference

    一藁海都,鈴木祥仁,松本章一

    第61回日本接着学会年次大会  2023.06 

  • 重合に誘起されるガラス化近傍での不均一性、相分離および反応加速 Domestic conference

    鈴木祥仁,松本章一

    第72回高分子学会年次大会  2023.05 

  • 剛直鎖ポリフマル酸エステルの凝集構造形成 Domestic conference

    石丸諒太郎,鈴木祥仁,松本章一

    第72回高分子学会年次大会  2023.05 

  • BOC基保護ポリメタクリル酸2-ヒドロキシエチルブラシの作製と特性評価 Domestic conference

    松並杏友加,森藤日菜,鈴木祥仁,松本章一

    第72回高分子学会年次大会  2023.05 

  • Polymerization-Induced Vitrification, Kinetic Heterogenization, and Reaction Acceleration during Bulk Polymerization of Methyl Methacrylate International conference

    Y. Suzuki, A. Matsumoto

    ACS Spring 2023  2023.03  American Chemical Society

     More details

    Venue:Indianapolis  

  • エポキシモノリスおよび共連続ポリマーネットワークの変形機構の解析 Domestic conference

    荒岸和真,冨永 蓮,鈴木祥仁,松本章一

    第18回日本接着学会関西支部若手の会  2022.11 

  • 化学反応に誘起される相分離,反応加速およびミクロ構造形成 Domestic conference

    鈴木祥仁

    大阪公立大学工学研究科記念シンポジウム  2022.11 

  • BOC保護したヒドロキシ基を含むアクリル酸エステル共重合体を用いた易解体性粘着剤の設計 Domestic conference

    一藁海都,坂本龍哉,鈴木祥仁,松本章一

    第42回粘着技術研究会  2022.11 

  • 熱酸発生剤を添加したBOC保護型ポリマーの反応制御:熱安定性の向上と迅速な熱応答脱保護反応の両立 Domestic conference

    赤堀涼太郎,大佐田開斗,鈴木祥仁,松本章一

    第42回粘着技術研究会  2022.11 

  • 示差熱走査熱量測定を用いたメタクリル酸エステルのバルク重合速度解析 Domestic conference

    三島隆太郎,鈴木祥仁,松本章一

    第71回高分子討論会  2022.09 

  • メタクリル酸メチルの重合誘起相分離を利用した構造形成と両疎媒性表面の作製 Domestic conference

    鈴木祥仁,小野里勝大,松本章一

    第71回高分子討論会  2022.09 

  • 化学反応に誘起されるガラス化、相分離、および反応加速 Invited Domestic conference

    鈴木祥仁

    大阪公立大学第132回テクノラボツアー「新材料・新物質の創生を可能にする応用化学研究」  2022.08 

  • メタクリル酸エステルのバルクラジカル重合挙動と添加剤の影響 Domestic conference

    三島隆太郎,鈴木祥仁,松本章一

    第68回高分子研究発表会(神戸)  2022.07 

  • 主鎖にメチレンスペーサーを持たないポリクロトン酸tert-ブチルの緩和挙動 Domestic conference

    岩上幸祐,鈴木祥仁,松本章一

    第68回高分子研究発表会(神戸)  2022.07 

  • 共連続ネットワークポリマーの強度発現および破壊機構の解析 Domestic conference

    冨永 蓮,鈴木祥仁,松本章一

    第60回日本接着学会年次大会  2022.06 

  • 重合誘起相分離を利用したポリメタクリル酸メチルの構造形成と機能性表面への応用 Domestic conference

    小野里勝大,鈴木祥仁,松本章一

    第60回日本接着学会年次大会  2022.06 

  • 熱酸発生剤の添加によるBOC基保護ポリメタクリル酸2-ヒドロキシエチルの側鎖分解反応の制御 Domestic conference

    大佐田開斗,鈴木祥仁,松本章一

    第71回高分子学会年次大会  2022.05 

  • 共連続ネットワークポリマーCNPの材料設計:第2成分ポリマーのネットワーク構造がCNP強度に及ぼす影響 Domestic conference

    冨永 蓮,鈴木祥仁,松本章一

    第71回高分子学会年次大会  2022.05 

  • PEGおよびPEG修飾デンドリマーの水和状態の解析 Domestic conference

    児島千恵,鈴木祥仁,辻本絢子,池本友佳,田中 賢,松本章一

    第71回高分子学会年次大会  2022.05 

  • ポリフマル酸エステルのβ緩和と非晶構造異方性 Domestic conference

    鈴木祥仁,深尾浩次,松本章一

    第71回高分子学会年次大会  2022.05 

  • 重合誘起相分離を利用したポリメタクリル酸メチルの構造形成と撥水性表面の作製 Domestic conference

    小野里勝大,鈴木祥仁,松本章一

    第71回高分子学会年次大会  2022.05 

▼display all

Collaborative research (seeds) keywords

  • 高分子ダイナミクス

  • バルク重合

  • 重合誘起相分離

  • 化学反応速度

Grant-in-Aid for Scientific Research

  • 化学反応に誘起されるガラス化と階層的不均一性

    2023

  • 化学反応に誘起されるガラス化と階層的不均一性

    Grant-in-Aid for Early-Career Scientists  2022.04

Charge of on-campus class subject

  • 物質化学生命系特別研究第1

    2023   Intensive lecture   Graduate school

  • 物質化学生命系特別演習第1

    2023   Intensive lecture   Graduate school

  • 有機化学演習IIA

    2023   Weekly class   Undergraduate

  • 応用化学実験III

    2023   Weekly class   Undergraduate

  • 初年次ゼミナール

    2023   Weekly class   Graduate school

  • 物質化学生命系特別演習

    2023   Intensive lecture   Graduate school

  • 物質化学生命系特別研究

    2023   Intensive lecture   Graduate school

  • 化学外国語演習

    2023   Weekly class   Undergraduate

  • 有機化学演習1

    2023   Weekly class   Undergraduate

  • 応用化学実験1

    2023   Weekly class   Undergraduate

  • 応用化学実験IV

    2023   Weekly class   Undergraduate

  • 応用化学実験II

    2023   Intensive lecture   Undergraduate

  • 応用化学実験V

    2023   Weekly class   Undergraduate

  • 応用化学特論3

    2023   Weekly class   Graduate school

  • 物質化学生命系特別研究第2

    2023   Intensive lecture   Graduate school

  • 物質化学生命系特別演習第2

    2023   Intensive lecture   Graduate school

  • 高分子化学2

    2023   Weekly class   Undergraduate

  • 化学外国語演習

    2022   Weekly class   Undergraduate

  • 応用化学実験I

    2022   Weekly class   Undergraduate

  • 物質化学生命系特別演習

    2022   Intensive lecture   Graduate school

  • 物質化学生命系特別演習第1

    2022   Intensive lecture   Graduate school

  • 応用化学実験III

    2022   Weekly class   Undergraduate

  • 物質化学生命系特別研究 (応用化学分野)

    2022   Intensive lecture   Graduate school

  • 物質化学生命系特別演習第2 (応用化学分野)

    2022   Intensive lecture   Graduate school

  • 応用化学特論3 (応用化学分野)

    2022   Weekly class   Graduate school

  • 応用化学実験II

    2022   Weekly class   Undergraduate

  • 応用化学実験IV

    2022   Weekly class   Undergraduate

  • 応用化学実験V

    2022   Weekly class   Undergraduate

  • 高分子化学I

    2022   Weekly class   Undergraduate

  • 有機化学演習IA

    2022   Weekly class   Undergraduate

  • Laboratory Exercises for Applied Chemistry II

    2021   Practical Training  

  • Laboratory Exercises for Applied Chemistry I

    2021   Practical Training  

  • Laboratory Exercises for Applied Chemistry V

    2021   Practical Training  

  • Laboratory Exercises for Applied Chemistry III

    2021   Practical Training  

  • Exercises in Chemical Foreign Languages

    2021    

  • Laboratory Exercises for Applied Chemistry IV

    2021   Practical Training  

  • Exercises in Organic Chemistry IA

    2021    

  • Laboratory Exercises for Applied Chemistry I

    2021   Practical Training  

  • Exercises in Organic Chemistry IA

    2021    

  • Laboratory Exercises for Applied Chemistry V

    2021   Practical Training  

  • Laboratory Exercises for Applied Chemistry IV

    2021   Practical Training  

  • Laboratory Exercises for Applied Chemistry II

    2021   Practical Training  

  • Exercises in Chemical Foreign Languages

    2021    

  • Laboratory Exercises for Applied Chemistry I

    2021   Practical Training  

▼display all

Faculty development activities

  • 工学FD集会受講  2022

  • 学生実験 ピア授業参観  2022

Number of papers published by graduate students

  • 2023

    Number of graduate students presentations:8

  • 2022

    Number of graduate students presentations:8

Number of instructed thesis, researches

  • 2023

    Number of instructed the graduation thesis:

  • 2022

    Number of instructed the graduation thesis:

    [Number of instructed the Master's Program] (previous term):