| 학회 |
한국공업화학회 |
| 학술대회 |
2009년 봄 (04/15 ~ 04/17, 호텔인터불고(대구)) |
| 권호 |
13권 1호 |
| 발표분야 |
고분자 |
| 제목 |
Dynamics of branched chains using XPCS |
| 초록 |
Relaxation times for the surface fluctuations of films of well-defined, anionically polymerized, highly branched polystyrene were measured X-ray photon correlation spectroscopy (XPCS).A hydrodynamic theory of overdamped capillary waves provided excellent fits to the data using the ratio of viscosity to surface tension as a single adjustable parameter.Combining those experimentally determined ratios with an analysis of the static off-specular scattering that provides surface tension made it possible to obtain viscosities at various temperatures.We found that bulk dynamics are architecture dependent.These revealed trends different from those for bulk viscosity measurement when film viscosities were calculated assuming a continuum model for surface capillary waves applied. |
| 저자 |
양세우 |
| 소속 |
LG화학 CRD(연) |
| 키워드 |
relaxation; XPCS; capillary wave; viscosity
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| E-Mail |
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