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Elucidation of Static and Dynamic Properties of Highly Branched Polymers

Research Project

Project/Area Number 14550844
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 高分子構造・物性(含繊維)
Research InstitutionKanazawa University

Principal Investigator

YAMAGISHI Tada-aki  Kanazawa University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (90220251)

Co-Investigator(Kenkyū-buntansha) INONE Tadashi  Kyoto University, Institute for Chemical Research, Associate Professor, 化学研究所, 助教授 (80201937)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2003: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2002: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsPhenolic resin / Highly branched polymer / Dilute solution properties / Conformation / Methylene linkage pattern / Dynamic birefringence measurement / Stress optical coefficient / Segment orientation mechanism / 置換基効果 / ミセル状分子
Research Abstract

Highly branched polymer was prepared by the condensation of phenol with paraformaldehyde in acetic acid using HC1 as catalyst. Linear polymer was prepared by the condensation of o-cresol with paraformaldehyde in acetic acid using HC1 as catalyst. The molecular weight dependence of intrinsic viscosity [η] and mean-square radius of gyration <S^2> for the highly branched and linear polymers were determined and the effect of side chain on the molecular conformation in solution was elucidated, respectively. For the linear polymer with lauroyl group, the phenolic main chain was aggregated in the center of molecule and the alkyl side chain was external to the molecule in n-octane. The conformation was like a micelle. On the other hand, the phenolic main and alkyl side chain coexisted and the conformation was extended in MIBK. For the highly branched polymer the effect of side chain on the conformation is not remarkable. This is due to the flexibility of linear polymer.
A graft copolymer having … More poly(2-vinylpyridine) trunk and sixty-eight polystyrene branches was prepared by anionic coupling method. The trunk span between branching points was about two times wider than the Rouse segment size for linear polystyrene. Dynamic birefringence and dynamic viscoelastic measurements around Tg zone showed that the complex Young's modulus and the strain optical coefficient of the copolymer was similar to those of linear polystyrene. The stress optical coefficients for the rubbery and the glassy components, respectively, agreed with those for linear polystyrene, meaning that no indication of microphase separation was ideologically detected over a whole rang of frequencies studied. The effect of branching was not observed in the frequency dependence of the glassy component. In the rubbery zone, the mode observed at short times was attributed to motion of polystyrene branches, and the other mode at long times was related to the motion of poly(2-vinylpyridine) trunk. Although Mw of poly(2-vinylpyridine) was much higher than the molecular weight of entanglement strands of linear polystyrene, the rubbery plateau zone was not clearly observed, possibly due to inhibition ofentanglements by branching. Less

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 山岸忠明 ら: "側鎖を有するオルトクレゾール樹脂の溶液物性"高分子論文集. 60. 192-198 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 山岸忠明 ら: "新しい反応性フェノール樹脂の合成"接着. 48. 74-78 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 井上正志 ら: "グラフトコポリマーの動的複屈折と粘弾性"材料. 印刷中. (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 山岸忠明 ら: "PEGとの複合体形成に及ぼすフェノール樹脂構造の影響"高分子加工. 印刷中. (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Yamagishi et al.: "Solution Properties of Substituted o-Cresol Resins"Kobunshi Ronbunsh. 60. 192 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Yamagishi et al.: "Synthesis of New Reactive Phenolic Resins"Adhesion and adhesives. 48. 74 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Inoue et al.: "Birefringence and Viscoelasticity of Graft Copolymer"Journal of the Society of Materials, Japan. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Yamagishi et al.: "Effect of structure of phenolic resins on the complexation with PEG"Polymer Applications. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 山岸忠明: "側鎖を有するオルトクレゾール樹脂の溶液物性"高分子論文集. 60・4. 192-197 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Yamagishi: "Solution Properties of ο-Cresol Resin with Long Side Chain"Macromolecules. (印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Yamagishi: "Synthesis and Characterization of Phenol Novolaks with Different Methylene Linkage Patterns"J. Polym. Sci. Part A.

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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