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Evaluation of relationship between molecular structure and life time of polymeric materials

Research Project

Project/Area Number 17H04897
Research Category

Grant-in-Aid for Young Scientists (A)

Allocation TypeSingle-year Grants
Research Field Materials/Mechanics of materials
Research InstitutionSaitama University

Principal Investigator

Sakai Takenobu  埼玉大学, 理工学研究科, 准教授 (10516222)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥21,970,000 (Direct Cost: ¥16,900,000、Indirect Cost: ¥5,070,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Fiscal Year 2017: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
Keywords分子動力学シミュレーション / 粘弾性挙動 / 高分子構造 / 粘弾性特性 / 高分子材料 / 粘弾性力学 / 変形 / 破壊 / 応力緩和挙動 / 高分子構造・物性
Outline of Final Research Achievements

In this study, to understand the effect of difference in molecular structure on viscoelastic behavior, tensile and stress relaxation analysis of polyolefin were carried out by molecular dynamic simulation. In the case of tensile analysis, free volume inside of polymers were increased with tensile strain increased. It was clarified that the increase of free volume leads to the occurrence of damage, and they have the strain rate and temperature dependency. In the case of stress relaxation analysis, relaxation speed decreased with the molecular weight of side chain increased. And it was revealed that the stress relaxation behavior shifts the conformation to the stable confirmation such as trans type and reduces kinking.

Academic Significance and Societal Importance of the Research Achievements

本研究では、高分子構造と高分子材料特有の粘弾性挙動を、破壊および変形の観点から議論しており、側鎖と粘弾性挙動の間の関係性を明らかにした。さらに変形による自由体積の増加など新たなことが明らかになったことで、高分子構造による材料設計の指標をより明確にできた。これらの結果より、任意の粘弾性特性を有する材料の設計指針を策定する可能性および、未知なる高分子の構造から粘弾性挙動を予測できる可能性を示唆している。
本研究内容は、粘弾性力学に及ぼす分子構造の影響ということで、学術的にも価値があるだけでなく、目的の特性を有する高分子材料の設計指針を得る可能性を議論しており、工学的にも意義がある。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (8 results)

All 2020 2019 2018 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Remarks (3 results)

  • [Journal Article] 分子動力学シミュレーションによるポリカーボネートの体積クリープの静水圧依存性評価2019

    • Author(s)
      坂井 建宣, 鈴木 将士, 蔭山 健介
    • Journal Title

      日本複合材料学会誌

      Volume: 45 Pages: 26-33

    • NAID

      130007784960

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] 高分子構造を考慮したPhysical Agingの分子動力学シミュレーション2020

    • Author(s)
      中西和輝、蔭山健介、坂井建宣
    • Organizer
      第51回応力・ひずみ測定と強度評価シンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] Molecular Dynamics Simulation of Viscoelastic Behavior of Polypropylene2018

    • Author(s)
      Takenobu Sakai, Yuichiro Kudo, Satoshi Kobayashi and Kensuke Kageyama
    • Organizer
      the 11th International Conference on the Mechanics of Time Dependent Materials
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Evaluation of Weak Bond in Adhesive Joints of CFRP2018

    • Author(s)
      Atsushi Tamura, Kensuke Kageyama and Takenobu Sakai
    • Organizer
      13th International Symposium on Advanced Science and Technology in Experimental Mechanics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高分子材料の応力緩和現象の分子動力学的解釈2018

    • Author(s)
      坂井 建宣, 工藤 雄一郎, 蔭山 健介
    • Organizer
      第43回複合材料シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Remarks] 坂井 建宣|埼玉大学 テニュアトラック

    • URL

      http://www.saitama-u.ac.jp/iron/tt/researchers/%e5%9d%82%e4%ba%95-%e5%bb%ba%e5%ae%a3

    • Related Report
      2018 Annual Research Report
  • [Remarks] 坂井 建宣|研究企画推進室

    • URL

      http://s-read.saitama-u.ac.jp/researchers/pages/researcher/okiGVvER

    • Related Report
      2018 Annual Research Report
  • [Remarks] 埼玉大学 材料工学研究室

    • URL

      http://mehp.mech.saitama-u.ac.jp/

    • Related Report
      2017 Annual Research Report

URL: 

Published: 2017-04-28   Modified: 2021-02-19  

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