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New Syhtnetic Stratedy of Cyclic Vinyl Polymers via Ring-Closing of Telechelic Polymers without Need of Highly Diluted Conditions

Research Project

Project/Area Number 18K19112
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 35:Polymers, organic materials, and related fields
Research InstitutionNagoya Institute of Technology

Principal Investigator

TAKASU Akinori  名古屋工業大学, 工学(系)研究科(研究院), 教授 (30303697)

Project Period (FY) 2018-06-29 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2019: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2018: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Keywords環状高分子 / 無希釈条件 / ビニルポリマー / N-ヘテロ環状カルベン / ソルビン酸エステル / メタクリル酸メチル / メタクリル酸アリル / 1:1付加体 / メタクリル酸メチル(MMA) / メタクリル酸アリル(AMA) / 直接観察 / 透過型電子顕微鏡(TEM) / 原子間力顕微鏡(AFM) / アニオン重合 / 希釈条件を必要としない閉環反応 / 立体規則性
Outline of Final Research Achievements

We proposed the new synthetic procedure of cyclic vinyl polymers via anionic chain-growth polymerization of vinyl monomers including methyl sorbate (MS) initiated by a typical N-heterocyclic carbene (NHC), 1,3-di-tert-butylimidazol-2-ylidene (NHCtBu), as initiator. In the presence of an aluminum Lewis acid, the propagation was predominant compared with ring-closing; i.e. after monomer consumption, a ring-closure occurred to give cyclic 1,4-trans poly(MS) via threo selective addition. This is the first synthetic trial of a cyclic vinyl polymer via chain-growth polymerization which escaped entropic drawback (extremely high dilution). Such study triggered us to extentend a range of suitable vinyl monomers. Using an adduct of NHCtBu and MS as the initiator, umpolung (dipole inversion) of Michael acceptors via alpha-terminal proton abstraction by the propagating anion, were suppressed, which enabled us to synthesize cyclic poly(methyl methacrylate) and poly(allyl methacrylate).

Academic Significance and Societal Importance of the Research Achievements

我々の暮らしを支えるソフトマテリアル(高分子)材料の高性能化はますます要求が高くなり、その構造の多様化のみならず分子鎖の絡み合いなどトポロジー制御が不可欠となってきた。環状ビニルポリマーを合成するには、分子間の反応を抑制するために高希釈条件が必要であったが、申請者の独創的な発想に基づいて、開始剤として働いたN-ヘテロ環状カルベンが対カチオンとして成長アニオンに隣接することで、高希釈条件を必要としない新規合成法を提案し、いくつかの環状ビニルポリマーが合成できた。この研究により、新たな性質を有するソフトマテリアル(高分子)材料の開発がよりアクセスしやすくなったという学術意義は非常に大きい。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (24 results)

All 2020 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (20 results) (of which Int'l Joint Research: 5 results,  Invited: 7 results) Book (1 results)

  • [Journal Article] Synthesis of cyclic Poly(methyl methacrylate) via N-Heterocyclic carbene (NHC) initiated-anionic polymerization and subsequent ring-closing without need of highly dilute conditions2020

    • Author(s)
      Yosuke Oga, Yuhei Hosoi, Akinori Takasu
    • Journal Title

      Polymer

      Volume: 186 Pages: 122019-122019

    • DOI

      10.1016/j.polymer.2019.122019

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Direct Observation of a Cyclic Vinyl Polymer Prepared by Anionic Polymerization using N-Heterocyclic Carbene and Subsequent Ring-Closure without Highly Diluted Conditions2020

    • Author(s)
      Keiji Naruse, Akinori Takasu, Masahiro Higuchi
    • Journal Title

      Macromolecular Chemistry and Physics

      Volume: 221 Issue: 10 Pages: 2000004-2000004

    • DOI

      10.1002/macp.202000004

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] N-ヘテロ環状カルベンを開始剤とする高分子合成2019

    • Author(s)
      高須昭則
    • Journal Title

      高分子

      Volume: 68 Pages: 67-68

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] N-置換マレイミドのN-ヘテロ環状カルベンによるアニオン重合2019

    • Author(s)
      大賀陽介, 高須昭則
    • Organizer
      第68回高分子学会年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 無希釈条件下での閉環反応による環状ビニルポリマー合成法の新展開2019

    • Author(s)
      高須昭則
    • Organizer
      高分子学会 高分子基礎物性研究会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] N-ヘテロ環状カルベンを用いた各種ビニルモノマーの重合とその閉環反応2019

    • Author(s)
      大賀陽介, 高須昭則
    • Organizer
      第50回中部化学関連学協会支部連合秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] N-ヘテロ環状カルベンによるN-置換マレイミドのアニオン重合及びその閉環反応2019

    • Author(s)
      大賀陽介, 高須昭則
    • Organizer
      第68回高分子討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] N-ヘテロ環状カルベンを開始剤に用いた環状ポリメタクリル酸メチルの新規合成法2019

    • Author(s)
      大賀陽介, 細井悠平, 高須昭則
    • Organizer
      第68回高分子討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] N-ヘテロ環状カルベンを用いた非共役ジエンのアニオン重合2019

    • Author(s)
      成瀬恵司, 高須昭則
    • Organizer
      第68回高分子討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Syntheis of Cyclic Vinyl Polymers Via Ring-closure Procedure Without Need of Highly Diluted Condition2019

    • Author(s)
      Akinori Takasu
    • Organizer
      The 16th Pacific Polymer Conference (PPC16)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] New Synthetic Method of Cyclic Vinyl Polymers Initiated by N-Heterocyclic Carbene without Highly Diluted Condition2019

    • Author(s)
      Yosuke Oga, Akinori Takasu
    • Organizer
      The 16th Pacific Polymer Conference (PPC16)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Anionic Polymerization of Non-conjugated Diene Initiated by N-Heterocyclic Carbene in the Presence of Lewis Acid2019

    • Author(s)
      Keiji Naruse, Akinori Takasu
    • Organizer
      The 16th Pacific Polymer Conference (PPC16)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 無希釈条件下での閉環反応による環状ビニルポリマー合成法の新展開2019

    • Author(s)
      高須昭則
    • Organizer
      2018年度東海高分子学生研究会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Design of Cyclic Vinyl Polymers via Ring-Closure Procedure without Highly Diluted Condition2019

    • Author(s)
      Akinori Takasu
    • Organizer
      International Symposium: Polymers Meet Topology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Synthesis of Cyclic Vinyl Polymer Initiated by N-Heterocyclic Carbene2018

    • Author(s)
      Yuhei Hosoi, Akinori Takasu
    • Organizer
      The 12th SPSJ International Polymer Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] N-ヘテロ環状カルベンを用いた環状ビニルポリマーの設計と合成2018

    • Author(s)
      細井悠平, 高須昭則
    • Organizer
      第49回中部化学関連学協会支部連合秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 希釈条件を必要としない閉環反応による環状ビニルポリマーの設計と合成2018

    • Author(s)
      高須昭則
    • Organizer
      高分子学会 中国四国支部高分子研究会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 希釈条件を必要としない閉環反応による環状ビニルポリマーの合成2018

    • Author(s)
      高須昭則
    • Organizer
      第67回高分子討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] N-ヘテロ環状カルベンを用いた環状ビニルポリマーの合成2018

    • Author(s)
      細井悠平, 高須昭則
    • Organizer
      第67回高分子討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] 希釈条件を必要としない閉環反応による環状ビニルポリマーの設計と合成2018

    • Author(s)
      高須昭則
    • Organizer
      第11回日本ゼオン座談会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 希釈条件を必要としない閉環反応による環状ビニルポリマーの設計と合成2018

    • Author(s)
      高須昭則
    • Organizer
      第67回高分子学会年次大会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] N-ヘテロ環状カルベン/ルイス酸触媒系による立体規則性ポリ(乳酸)の合成2018

    • Author(s)
      成瀬恵司, 高須昭則
    • Organizer
      第67回高分子学会年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] ルイス酸存在下におけるN-ヘテロ環状カルベンを用いた環状ビニルポリマーの合成と拡張2018

    • Author(s)
      細井悠平, 高須昭則
    • Organizer
      第67回高分子学会年次大会
    • Related Report
      2018 Research-status Report
  • [Book] 環状高分子の合成と機能発現2018

    • Author(s)
      細井悠平, 高須昭則
    • Total Pages
      9
    • Publisher
      シーエムシー出版
    • Related Report
      2018 Research-status Report

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Published: 2018-07-25   Modified: 2021-02-19  

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