Dynamics and rheology of a supercooled polymer melt
作者:
R. Yamamoto,
A. Onuki,
期刊:
AIP Conference Proceedings
(AIP Available online 1900)
卷期:
Volume 519,
issue 1
页码: 151-157
ISSN:0094-243X
年代: 1900
DOI:10.1063/1.1291531
出版商: AIP
数据来源: AIP
摘要:
Molecular dynamics simulations are performed for a polymer melt composed of short chains in quiescent and sheared conditions in supercooled states. In quiescent states, while the self chain motions are excellently described by the Rouse model, the stress relaxation functionG(t)exhibits a stretched exponential decay in a relatively early stage and ultimately follows the Rouse function. Transient stress evolution after application of shear obeys the linear growth∫0tdt′G(t′)for strain less than 0.1 and then saturates into a non-Newtonian viscosity. A glassy component of the stress is much enhanced as compared to the entropic component. ©2000 American Institute of Physics.
点击下载:
PDF
(395KB)
返 回