INTERMOLECULAR COOPERATIVITY AND THE TEMPERATURE-DEPENDENCE OF SEGMENTAL RELAXATION IN SEMICRYSTALLINE POLYMERS

被引：78

作者：

NGAI, KL ^{[1
]}

ROLAND, CM ^{[1
]}

机构：

[1] USN,WASHINGTON,DC 20375

来源：

MACROMOLECULES | 1993年 / 26卷 / 11期

关键词：

D O I：

10.1021/ma00063a008

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 effect of the presence of a crystalline phase on the temperature dependence of segmental relaxation is examined. For both an aromatic and an aliphatic polyester, for polypropylene, and for poly-(dimethylsiloxane) (PDMS), it is demonstrated that crystallinity has an insignificant effect on the temperature dependence of the segmental relaxation time when the temperature is normalized by the glass transition temperature, T(g), of the polymer. This allows the correlation between time and temperature dependencies of segmental relaxation, whereby more intermolecularly cooperative relaxations have a stronger dependence on T(g)-normalized temperature, to continue to be used to assess the intermolecular coupling strength in semicrystalline polymers.

引用

页码：2688 / 2690

页数：3

共 35 条

[1] DIELECTRIC-RELAXATION OF POLYDIMETHYLSILOXANE [J].