Fragility in side-chain liquid crystalline polymers: the TSDC contribution

被引：22

作者：

Correia, NT ^{[1
]}

Alvarez, C ^{[1
]}

Moura-Ramos, JJ ^{[1
]}

机构：

[1] IST, Ctr Quim Fis Mol, P-1046001 Lisbon, Portugal

来源：

POLYMER | 2000年 / 41卷 / 24期

关键词：

glass formers; glass transition; fragility;

D O I：

10.1016/S0032-3861(00)00248-2

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In the present work a procedure is proposed to obtain the fragility of a glass from Thermally Stimulated Depolarisation Currents (TSDC) data. From previous TSDC studies on wide series side-chain liquid crystalline polymers, and particularly from a careful thermal sampling analysis of their glass transition relaxation, the fragility parameter was obtained. The proposed fragility scale is based on the concept of deviation from the zero entropy prediction, and is such that zero is the limit of fragility for infinitely strong glasses. The fragility of 10 side chain liquid crystalline polymers is discussed in terms of their molecular structure. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：8625 / 8631

页数：7

共 26 条

[1] Glass transition relaxation and fragility in a side-chain liquid crystalline polymer: a study by TSDC and DSC [J].