Dynamics around the sol‐gel transition in thermoreversible atactic polystyrene gels
作者:
A. Matic,
J. Mattsson,
R. Bergman,
期刊:
AIP Conference Proceedings
(AIP Available online 1904)
卷期:
Volume 708,
issue 1
页码: 72-75
ISSN:0094-243X
年代: 1904
DOI:10.1063/1.1764064
出版商: AIP
数据来源: AIP
摘要:
We present a dielectric relaxation spectroscopy study of the dynamics in the thermoreversible polymer gel system atactic polystyrene/toluene. We observe three distinct relaxational process, the &agr;‐ and &bgr;‐relaxations related to solvent dynamics and a process related to the dynamics of the polymer network. While both the &agr;‐relaxation and the network processes are slowed down with increasing polymer content, the &bgr;‐relaxation remains practically unchanged. The behaviour of the relaxational process related to the polymer network, shows no distinct change at gelation, suggesting that there are no major changes taking place in the polymer network on the length scale of the observed relaxation. Furthermore, it is possible to construct a master curve of the temperature dependence of the relaxation time of the matrix relaxation by a simple temperature scaling. © 2004 American Institute of Physics
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