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Viscoelastic properties of semiflexible polymers and application to reinforcement effects

Research Project

Project/Area Number 19H02777
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 35020:Polymer materials-related
Research InstitutionOsaka University

Principal Investigator

Inoue Tadashi  大阪大学, 理学研究科, 教授 (80201937)

Co-Investigator(Kenkyū-buntansha) 浦川 理  大阪大学, 理学研究科, 准教授 (70273539)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2019: ¥13,000,000 (Direct Cost: ¥10,000,000、Indirect Cost: ¥3,000,000)
Keywords粘弾性 / 半屈曲性高分子 / 緻密からみ合い / 動的複屈折 / からみ合いの普遍性 / 配向緩和 / Morse理論 / 曲げモード / 応力光学則 / 補強効果 / からみ合い / 繊維補強 / 流動光学 / 複屈折 / レオロジー / 配向緩和モード / 伸長モード / からみ合い高分子
Outline of Research at the Start

高分子の物性は,ガウス鎖を用いて表されることが多いが,DNAや多糖などの多くの天然高分子は,硬さの目安となる持続長が長く半屈曲性高分子である.半屈曲性高分子の物性研究はこれまで行われてきたが,粘弾性に関してはからみ合い系のデータが欠如しているなど,不十分で未解明の部分が多く残されている.特にからみ合い長が持続長より短くなる緻密絡 み合い系は,全く研究が行われていない.最近,我々は予備的な実験を成功させたので,本研究ではその結果を発展させ,緻密絡み合い系を含めた半屈曲性高分子溶液の粘弾性の全容 を解明することを目的とする.

Outline of Final Research Achievements

The viscoelasticity of flexible polymers can be described by entropic elasticity due to segment orientation. In contrast, in the case of semi-flexible polymers, in addition to orientation, bending and elongation modes are expected to contribute to viscoelasticity. In this study, using poly(γ-benzyl L-glutamic acid) as a model polymer, we show that the Morse theory can describe viscoelasticity in the dilute region well. Furthermore, viscoelasticity at high concentrations can be reasonably predicted by considering hydrodynamic and topological interactions. In particular, viscoelasticity in the tightly entangled region, which is unique to semi-flexible polymers, was clarified for the first time with the strain-induced birefringence. In addition, we clarified a universal function for the relationship between entanglement density and molecular structure experimentally.

Academic Significance and Societal Importance of the Research Achievements

持続可能な社会の実現のために,セルロースナノファイバーなどの天然由来の新材料を有効に使うことが望まれている.本研究では,ナノファイバーが半屈曲性高分子として振る舞うことを着目し,その粘弾性と補強効果に関する基礎的かつ普遍的な知見を,希薄域から濃厚域まで初めて系統的に明らかにした.ナノファイバーならではの,細さに由来する熱運動により励起される曲げと伸長モードの寄与をあきらにしている.本研究の成果を基に,天然由来のナノファイバーを用いた材料の物性に関して,その制御と向上が達成できると期待される.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (24 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (11 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 1 results) Presentation (12 results) (of which Int'l Joint Research: 7 results,  Invited: 9 results)

  • [Int'l Joint Research] スラナリー工科大学(タイ)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Rheology of Tightly Entangled DNA Aqueous Solutions2022

    • Author(s)
      Masumi Kinoshita、Urakawa Osamu、Inoue Tadashi
    • Journal Title

      Nihon Reoroji Gakkaishi

      Volume: 50 Issue: 2 Pages: 225-233

    • DOI

      10.1678/rheology.50.225

    • ISSN
      0387-1533, 2186-4586
    • Year and Date
      2022-04-15
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Linear Viscoelasticity and Birefringence of Poly-γ-Benzyl-L-Glutamate Solutions2021

    • Author(s)
      Inoue Tadashi、Furusawa Naomi、Urakawa Osamu
    • Journal Title

      Macromolecules

      Volume: 54 Issue: 24 Pages: 11360-11371

    • DOI

      10.1021/acs.macromol.1c01398

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rheo-Optical Study on the Viscoelastic Relaxation Modes of a Microgel Particle Suspension around the Liquid?Solid Transition Regime2021

    • Author(s)
      Shangwei Li、Urakawa Osamu、Inoue Tadashi
    • Journal Title

      Macromolecules

      Volume: 54 Issue: 7 Pages: 3270-3280

    • DOI

      10.1021/acs.macromol.0c02205

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Strain-Induced Birefringence of Amorphous Polymers and Molecular Design of Optical Polymers2021

    • Author(s)
      Inoue Tadashi
    • Journal Title

      ACS Applied Polymer Materials

      Volume: 3 Issue: 5 Pages: 2264-2273

    • DOI

      10.1021/acsapm.1c00149

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rheological Scaling of Ionic Liquid-Based Polyelectrolytes in the Semidilute Unentangled Regime from Low to High Salt Concentrations2021

    • Author(s)
      Matsumoto Atsushi、Yoshizawa Ryota、Urakawa Osamu、Inoue Tadashi、Shen Amy Q.
    • Journal Title

      Macromolecules

      Volume: 54 Issue: 12 Pages: 5648-5661

    • DOI

      10.1021/acs.macromol.1c00576

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Rheo-Optical and Dielectric Study on Dynamics of Bottlebrush-like Polymacromonomer Consisting of a Polyisoprene Main Chain and Polystyrene Side Chains2020

    • Author(s)
      Hiroshi Iwawaki, Osamu Urakawa, Tadashi Inoue, Yo Nakamura, Yumi Matsumiya, and Hiroshi Watanabe
    • Journal Title

      Macromolecules

      Volume: 53 Issue: 16 Pages: 7096-7106

    • DOI

      10.1021/acs.macromol.0c01041

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A rheo-optical study on the linear viscoelasticity and molecular dynamics of block copolymer solutions forming hexagonal close-packed cylindrical domains2020

    • Author(s)
      Tamura Eiko、Kume Takuji、Okamoto Shigeru、Inoue Tadashi
    • Journal Title

      Polymer Journal

      Volume: 52 Issue: 9 Pages: 1085-1091

    • DOI

      10.1038/s41428-020-0346-5

    • NAID

      40022335696

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of Host-Guest Interaction on Swelling Behavior and Equilibrium Swollen State of Host-Guest Gel2019

    • Author(s)
      Kashiwagi Yu、Katashima Takuya、Takashima Yoshinori、Harada Akira、Inoue Tadashi
    • Journal Title

      Nihon Reoroji Gakkaishi

      Volume: 47 Issue: 3 Pages: 99-104

    • DOI

      10.1678/rheology.47.99

    • NAID

      130007672761

    • ISSN
      0387-1533, 2186-4586
    • Year and Date
      2019-06-14
    • Related Report
      2019 Annual Research Report
  • [Journal Article] Viscoelastic Relaxation of Cellulose Nanocrystals in Fluids: Contributions of Microscopic Internal Motions to Flexibility2019

    • Author(s)
      Tanaka Reina、Kashiwagi Yu、Okada Yuki、Inoue Tadashi
    • Journal Title

      Biomacromolecules

      Volume: 21 Issue: 2 Pages: 408-417

    • DOI

      10.1021/acs.biomac.9b00943

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Glass Transition Behaviors of Poly (Vinyl Pyridine)/Poly (Vinyl Phenol) Revisited2019

    • Author(s)
      Urakawa Osamu、Yasue Ayaka
    • Journal Title

      Polymers

      Volume: 11 Issue: 7 Pages: 1153-1153

    • DOI

      10.3390/polym11071153

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Ion Transport in Pendant and Backbone Polymerized Ionic Liquids2019

    • Author(s)
      Kuray Preeya、Noda Takeru、Matsumoto Atsushi、Iacob Ciprian、Inoue Tadashi、Hickner Michael A.、Runt James
    • Journal Title

      Macromolecules

      Volume: 52 Issue: 17 Pages: 6438-6448

    • DOI

      10.1021/acs.macromol.8b02682

    • Related Report
      2019 Annual Research Report
  • [Presentation] Reinforcement effects of nanoparticles and nanofibers in polymer composites2021

    • Author(s)
      Inoue Tadashi
    • Organizer
      Taiwan-Japan bilateral polymer symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Experimental Test of the Universality of Entanglement in Flexible and Semiflexible Polymers2021

    • Author(s)
      Inoue Tadashi
    • Organizer
      IUPAC MACRO2020+
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 高分子レオロジー:からみ合いの物理化学2021

    • Author(s)
      井上正志
    • Organizer
      関西レオロジー研究会第80回例会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 高分子の粘弾性と鎖の剛直性の関係について2021

    • Author(s)
      井上正志
    • Organizer
      化学研究所講演会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Viscoelastic properties of tightly entangled polymeric systems2020

    • Author(s)
      Tadashi Inoue
    • Organizer
      International congress on rheology 2020,
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 半屈曲性高分子溶液の緻密からみ合い系の粘弾性2020

    • Author(s)
      木下真寿美
    • Organizer
      第68回レオロジー討論会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Nonlinear Rheology of Semiflexible Polymer Solutions2019

    • Author(s)
      井上正志
    • Organizer
      Annual European Rheology Conference 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Rheology in Japan2019

    • Author(s)
      井上正志
    • Organizer
      The 2nd Materials Research Society of Thailand International Conference (MRS-Thailand 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Viscoelastic Properties of Semiflexible Polymers and Cellulose Nanofibers2019

    • Author(s)
      井上正志
    • Organizer
      The 16th Pacific Polymer Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Pendant vs Backbone: Ion conductivity of polymerized ionic liquids2019

    • Author(s)
      井上正志
    • Organizer
      Korea-Japan Joint Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] セルロース誘導体およびセルロースナノファイバーの粘弾性特性2019

    • Author(s)
      井上正志
    • Organizer
      2019年度第68回高分子学会北陸支部研究発表会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 粘弾性と複屈折の同時測定による高分子レオロジーの精密解析2019

    • Author(s)
      井上正志
    • Organizer
      レオロジー学会年会:受賞講演
    • Related Report
      2019 Annual Research Report
    • Invited

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Published: 2019-04-18   Modified: 2023-01-30  

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