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1989 Fiscal Year Final Research Report Summary

Molecular motion and material properties of cosoluble polymer blends

Research Project

Project/Area Number 63470091
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 高分子物性
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

OSAKI Kunihiro  Kyoto University, Institute for Chemical Research, Professor, 化学研究所, 教授 (00027046)

Co-Investigator(Kenkyū-buntansha) NEMOTO Norio  Kyoto University, Institute for Chemical Research, Associate Professor, 化学研究所, 助教授 (90027053)
Project Period (FY) 1988 – 1989
Keywordspolymer blend / cosoluble polymer / viscoelasticity / birefringence / stress relaxation / entanglement
Research Abstract

The blend of cosoluble polymers, polystyrene (PS) and poly(vinyl methyl ether), (PVME), was instantaneously deformed and the relaxation of stress and birefringence were measured. Owing to the difference of the segmental optical anisotropy of two polymers, one can estimate the degree of deformation of the segments of each component from the birefringence.
In the case of the blend of long PS chains and short PVME chains, the relaxation modulus exhibited two rubbery plateau regions. One, at short times and with a higher modulus was corporated with the deformation of both polymer components: the stress in this region was supported by all the polymer segments in the system. A part of the modulus then relaxed as the short PVME chains lost the effect of deformation and became optically isotropic.
The stress in the second plateau region was supported exclusively by the long PS chains and the modulus was equal to that of the PS solution, with the same PS content as the blend, in an ordinary solvent of low molecular weight.
The PS chains in the blend supported;more stress at short times than the chains in the solution did. The extra stress, apparently due to the PS-PVME entanglement, relaxed as the PVME lost the effect of deformation. The rate of relaxation was not affected by the molecular weight of the long PS chains. These results substantiate the modern concept of the polymer chain entanglement.

  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 尾崎邦宏: "ブロック共重合体の複屈折" 日本レオロジ-学会誌. 16. 81-85 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 高取永一: "高分子混合系の粘弾性・ポリスチレン-ポリビニルメチルエ-テル混合物の溶液" 日本レオロジ-学会誌. 16. 171-175 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Osaki: "Birefringence of a Block Copolymer Solution in the Stress Relaxation Process" Macromolecules. 22. 2457-2460 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 高橋秀郎: "流動曲線が交差する非相容ポリマ-ブレンド系の流動特性" 日本レオロジ-学会誌. 17. 162-165 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 高橋秀郎: "非相容ポリマ-ブレンド系の流動特性の計算モデル" 日本レオロジ-学会誌. 17. 223-236 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 柴崎誠一: "流動複屈折法による高分子混合系の粘弾性の研究" 日本レオロジ-学会誌. 18. 39-43 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Osaki(分担執筆): "Molecular Conformation and Dynamics of Macromolecules in Condensed Systems" Elsevier, 369 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Osaki and E. Takatori: "Flow Birefringence of a Triblock Copolymer in Steady Shear Flow" Nihon Reoroji Gakkaishi Vol. 16, No. 2 pp. 81-85, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] E. Takatori, S. Shibasaki, K. Osaki, and M. Kurata: "Viscoelasticity of Polymer Blends" Nihon Reoroji Gakkaishi Vol. 16, No. 4 pp. 171-175, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Osaki, E. Takatori, M. Ueda, M. Kurata, T. Kotaka, and H. Ohnuma: "Birefringence of a Block Copolymer Solution in the Stress Relaxation Process" Macromolecules Vol. 22, No. 5 pp. 2457-2460, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Takahashi, A. Koiwai, O. Kamigaito, and K. Osaki: "Characteristics of Flow Curves for Blends of Immiscible Polymers with Intersecting Flow Curves" Nihon Reoroji Gakkaishi Vol. 17, No. 3 pp. 162-165, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Takahashi, A. Koiwai, O. Kamigaito, and K. Osaki: "Influence of an Assumed Size of a Dispersoid on the Calculated Flow Curves of Immiscible Polymer Blends" Nihon Reoroji Gakkaishi Vol. 17, No. 4 pp. 223-226.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Shibasaki, T. Inoue, and K. Osaki: "Viscoelastic and Flow Birefringence Studies of Compatible Polymer Blends" Nihon Reoroji Gakkaishi Vol. 18 No. 1 pp. 39-43.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-26  

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