Enthalpy relaxation in glassy polystyrenes .2.

被引：27

作者：

Brunacci, A ^{[1
]}

Cowie, JMG ^{[1
]}

Ferguson, R ^{[1
]}

McEwen, IJ ^{[1
]}

机构：

[1] HERIOT WATT UNIV, DEPT CHEM, EDINBURGH EH14 4AS, MIDLOTHIAN, SCOTLAND

来源：

POLYMER | 1997年 / 38卷 / 13期

关键词：

enthalpy relaxation; physical ageing; equilibrium glass;

D O I：

10.1016/S0032-3861(96)00895-6

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 changes in enthalpy (Delta H-infinity) between the experimental glass and the fully relaxed glass for two polystyrene samples of different molar masses have been estimated using the Cowie-Ferguson approach. These were then compared with the change predicted by a simple two-state conformational energy expression for the specific heat increment at constant volume. Comments on the nature of allowed motions in the glass are made. (C) 1997 Elsevier Science Ltd.

引用

页码：3263 / 3268

页数：6

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