Molecular motion and material properties of cosoluble polymer blends

共溶聚合物共混物的分子运动和材料性能

• 批准号: 63470091
• 负责人: OSAKI Kunihiro
• 金额: $ 3.65万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63470091/
• 关键词: polymer blend; cosoluble polymer; viscoelasticity; birefringence; stress relaxation; entanglement; 分子運動; 高分子運動

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.

共溶聚合物聚苯乙烯（PS）和聚乙烯基甲基醚（PVME）的共混物，瞬时变形和应力松弛和双折射的测量。由于两种聚合物链段光学各向异性的不同，可以从双折射率来估计各组分链段的变形程度，在PS长链和PVME短链的共混物中，松弛模量呈现两个橡胶态平台区。第一，在短时间内，具有较高的模量与两种聚合物组分的变形相结合：该区域中的应力由系统中的所有聚合物链段支撑。在第二平台区，应力完全由PS长链支撑，其模量与PS含量相同的PS溶液在低分子量的普通溶剂中的模量相等。在短时间内比溶液中的链更大的应力。当PVME失去形变效应时，明显由于PS-PVME缠结而产生的额外应力松弛。松弛速率不受长PS链的分子量的影响。这些结果证实了高分子链缠结的现代概念。

项目成果

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.

S. Shibasaki、T. Inoue 和 K. Osaki：“相容聚合物共混物的粘弹性和流动双折射研究”Nihon Reoroji Gakkaishi Vol.1

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)

Eiichi Takatori：“聚苯乙烯-聚乙烯基甲基醚混合物的聚合物混合体系/溶液的粘弹性”日本流变学会杂志 16. 171-175 (1988)。

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)

Hideo Takahashi：“具有相交流动曲线的不相容聚合物共混体系的流动特性”日本流变学会杂志 17. 162-165 (1989)。

柴崎誠一: "流動複屈折法による相容性高分子混合系の粘弾性の研究" 日本レオロジ-学会誌. 18. 272-276 (1990)

Seiichi Shibasaki：“通过流动双折射法研究相容聚合物混合物体系的粘弹性”日本流变学会杂志 18. 272-276 (1990)。

K.Osaki(分担執筆): "Molecular Conformation and Dynamics of Macromolecules in Condensed Systems" Elsevier, 369 (1988)

K.Osaki（贡献者）：“凝聚系统中大分子的分子构象和动力学”Elsevier，369（1988）