| Project/Area Number |
13650952
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
高分子構造・物性(含繊維)
|
|---|
| Research Institution | KYOTO UNIVERSITY |
|---|
Principal Investigator |
INOUE Tadashi Kyoto University,Insitite for Chmeical Reserch lnst., 化学研究所, 助手 (80201937)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
尾崎 邦宏 京都大学, 化学研究所, 教授 (00027046)
|
|---|
| Project Period (FY) |
2001 – 2002
|
| Project Status |
Completed (Fiscal Year 2002)
|
| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2002: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2001: ¥2,500,000 (Direct Cost: ¥2,500,000)
|
|---|
| Keywords | 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 |
|---|
| Research Abstract |
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.
|
