Molecular Rheology of Polymer Solids: Evaluation of Internal Strain by Birefringence

聚合物固体的分子流变学：通过双折射评估内部应变

• 批准号: 13650952
• 负责人: INOUE Tadashi
• 金额: $ 2.11万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650952/
• 关键词: Strain Birefringence; Viscoelasticity; Modified Stress-Optical Rule; Glass Transition; Molecular Rheology; Subrelaxation; Pol ycarbonate; 複屈折; ガラス転移; 内部ひずみ; 分子レオロジー; ポリスチレン

Internal strain of polymer solids were estimated by birefringence measurement to elucidatate molecular origin of sub-relaxations. Dynamic birefringence and dynamic viscoelasticity of bisphenol A polycarbonate were simultaneously measured over a wide range of temperature from - 150 to 180℃. Large dispersion observed for the complex Young's modulus was found to be inactive for the complex strain-optical coefficients, which is the ratio of birefringence to the strain. The present result indicates that dispersion cannot be attributed to the reorientation of any atomic groups, but to the relaxation of internal strain by translational motions. Dynamic birefringence was anticipated to be a new experimental method for the sub relaxation of glassy polymers.

利用双折射测量方法估计了聚合物固体的内部应变，以阐明亚弛豫的分子来源。在- 150 ~ 180℃范围内同时测定了双酚A聚碳酸酯的动态双折射和动态粘弹性。在复杂的杨氏模量中观察到的大色散对复杂的应变光学系数（双折射与应变的比值）是无效的。目前的结果表明，色散不能归因于任何原子群的重新取向，而是归因于内部应变的平动松弛。动态双折射有望成为研究玻璃态聚合物亚弛豫的一种新的实验方法。

项目成果

井上正志et al.: "系統的に分子構造を変化させたポリカーボネート類の粘弾性と複屈折"材料. 52巻3号. 314-319 (2003)

Masashi Inoue 等人：“具有系统改变分子结构的聚碳酸酯的粘弹性和双折射”，材料，第 52 卷，第 3. 314-319 期。

Tadashi Inoue et al.: "SViscoelasticity of Polymers in Solvents around the Semidilute Regime"Macromolecules. 35巻号. 9169-9175 (2002)

Tadashi Inoue 等人：“半稀释状态下溶剂中聚合物的粘弹性”，Macromolecules 第 35 卷，第 9169-9175 期（2002 年）。

Tadashi Inoue et al.: "The Significance of the Rouse Segment : Its Concentration Dependence"Macromolecules. 35巻3号. 820-826 (2002)

Tadashi Inoue 等人：“Rouse 段的意义：其浓度依赖性”，《高分子》，第 35 卷，第 3 期，820-826（2002 年）