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Precise synthesis of knotted ring polymers and the visualization of the topology

Research Project

Project/Area Number 24350056
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Polymer chemistry
Research InstitutionNagoya University

Principal Investigator

TAKANO Atsushi  名古屋大学, 工学(系)研究科(研究院), 准教授 (00236241)

Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2012: ¥13,910,000 (Direct Cost: ¥10,700,000、Indirect Cost: ¥3,210,000)
Keywordsリングポリマー / 結び目 / トポロジー / 環状高分子 / SEC / IC / ポリイソプレン
Outline of Final Research Achievements

Telechelic polyisoprene (Mw=92k) was synthesized by an anionic polymerization and it was cyclized by end-to-end ring closure reaction in good and poor solvents under dilute conditions to synthesize unknotted/knotted ring polymers. The ring polymers obtained were separated from the cyclization reaction products by precipitational fractionation. By SEC-MALS measurements of the fractionated samples, it has been found that two ring polymers have almost the same molecular weight, while the ring formed in poor solvent reveals the smaller chain dimension than that of the ring formed in good solvent. These results clearly indicate the evidence of the formation of knotted ring polymers. To prepare polymer brush for the topology observation of a single molecule by AFM, grafting reaction was carried out to polyisoprene. From the AFM observation, architecture of knotted ring such as trefoil knot was clearly observed brushed ring formed in in poor solvent.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Annual Research Report
  • 2012 Annual Research Report
  • Research Products

    (14 results)

All 2015 2014 2013 2012 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (10 results)

  • [Journal Article] Melt Rheology of Ring Polystyrenes with Ultrahigh Purity2015

    • Author(s)
      Yuya Doi, Kazuki Matsubara, Yutaka Ohta, Tomohiro Nakano, Daisuke Kawaguchi, Yoshiaki Takahashi, Atsushi Takano, and Yushu Matsushita
    • Journal Title

      Macromolecules

      Volume: 48 Issue: 9 Pages: 3140-3147

    • DOI

      10.1021/acs.macromol.5b00076

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Precise Synthesis and Characterization of Tadpole-Shaped Polystyrenes with High Purity2013

    • Author(s)
      A.Takano et al.
    • Journal Title

      Macromolecules

      Volume: 46 Pages: 1075-1081

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Viscosity of Ring Polymer Melts2013

    • Author(s)
      A.Takano et al.
    • Journal Title

      ACS Macro Lett.

      Volume: 2

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Synthesis, separation and characterization of knotted ring polymers2012

    • Author(s)
      A.Takano, et al.
    • Journal Title

      Polymer

      Volume: 53 Issue: 2 Pages: 466-470

    • DOI

      10.1016/j.polymer.2011.12.034

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Presentation] 結び目を有する環状高分子の調製とトポロジー解析2014

    • Author(s)
      澤木大輝、髙野敦志、永野修作、関隆広、松下裕秀
    • Organizer
      第63回高分子学会年次大会
    • Place of Presentation
      名古屋
    • Year and Date
      2014-05-27
    • Related Report
      2014 Annual Research Report
  • [Presentation] バルク中における環状高分子の拡がりに及ぼす線状高分子の添加効果2014

    • Author(s)
      木下敬太、土肥侑也、高野敦志、松下裕秀
    • Organizer
      第63回高分子学会年次大会
    • Place of Presentation
      名古屋
    • Year and Date
      2014-05-27
    • Related Report
      2014 Annual Research Report
  • [Presentation] ポリマーブレンドの相溶性に及ぼす成分ポリマーの一次構造の影響-線状 vs 環状2014

    • Author(s)
      小林侑生、Siti Sarah、高野敦志、松下裕秀
    • Organizer
      第63回高分子学会年次大会
    • Place of Presentation
      名古屋
    • Year and Date
      2014-05-27
    • Related Report
      2014 Annual Research Report
  • [Presentation] くらげ型高分子の合成と粘弾性2014

    • Author(s)
      土肥侑也,高野敦志,高橋良彰,松下裕秀
    • Organizer
      日本レオロジー学会第41年会
    • Place of Presentation
      東京
    • Year and Date
      2014-05-15
    • Related Report
      2014 Annual Research Report
  • [Presentation] バルク中での環状高分子の拡がりに及ぼす線状高分子の添加効果2014

    • Author(s)
      木下敬太、土肥侑也、小林侑生、高野敦志、松下裕秀、高橋良彰
    • Organizer
      日本レオロジー学会第41年会
    • Place of Presentation
      東京
    • Year and Date
      2014-05-15
    • Related Report
      2014 Annual Research Report
  • [Presentation] ノット型環状ポリイソプレンの合成とキャラクタリゼーション2012

    • Author(s)
      澤木大輝、高野敦志, 他
    • Organizer
      高分子基礎物性研究会討論会
    • Place of Presentation
      東京
    • Year and Date
      2012-11-21
    • Related Report
      2012 Annual Research Report
  • [Presentation] ノット型環状ポリイソプレンの合成とキャラクタリゼーション2012

    • Author(s)
      澤木大輝、高野敦志, 他
    • Organizer
      第61回高分子学会年次大会
    • Place of Presentation
      横浜
    • Year and Date
      2012-05-29
    • Related Report
      2012 Annual Research Report
  • [Presentation] ノット型環状ポリイソプレンの精密合成とトポロジーキャラクタリゼーション2012

    • Author(s)
      澤木大輝、高野敦志, 他
    • Organizer
      第61回高分子討論会
    • Place of Presentation
      名古屋
    • Year and Date
      2012-05-29
    • Related Report
      2012 Annual Research Report
  • [Presentation] ノット型環状ポリイソプレンの合成とトポロジーキャラクタリゼーション

    • Author(s)
      澤木大輝、高野敦志、松下裕秀
    • Organizer
      第62回高分子学会年次大会
    • Place of Presentation
      京都
    • Related Report
      2013 Annual Research Report
  • [Presentation] ノット型環状ポリイソプレンの合成とトポロジーキャラクタリゼーション

    • Author(s)
      澤木大輝、高野敦志、松下裕秀
    • Organizer
      第62回高分子討論会
    • Place of Presentation
      金沢
    • Related Report
      2013 Annual Research Report

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Published: 2012-04-24   Modified: 2019-07-29  

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