Metastable states of glassy dynamics, possibly mimicking confinement-effects in thin polymer films

被引：73
|
作者：
Serghei, Anatoli [1 ]
Kremer, Friedrich [1 ]
机构：
[1] Univ Leipzig, Inst Expt Phys 1, D-04103 Leipzig, Germany
来源：
MACROMOLECULAR CHEMISTRY AND PHYSICS | 2008年 / 209卷 / 08期
关键词：
confinement-effects; glass transition; metastable states; molecular dynamics; thin polymer films;
D O I：
10.1002/macp.200700534
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The impact of the preparation and thermal films history on the dynamic glass transition in thin films of poly(methyl methacrylate) and poly(vinyl acetate) is systematically investigated means of broadband dielectric spectroscopy. Metastable states of glassy dynamics are detected, exhibiting shifts in the mean-relaxation time from the bulk values. These shifts - possibly mimicking confinement- effects in thin polymer films - become weaker (or even disappear) after an extensive annealing.
引用
收藏
页码：810 / 817
页数：8
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