Molecular motions in molecular glasses as studied by thermally stimulated depolarisation currents (TSDC)

被引：50
|
作者：
Correia, NT
Alvarez, C
Ramos, JJM
Descamps, M
机构：
[1] Inst Super Tecn, Ctr Quim Fis Mol, P-1049001 Lisbon, Portugal
[2] Univ Lille 1, Lab Dynam & Struct Mat Mol, CNRS, UA 801, F-59655 Villeneuve Dascq, France
来源：
CHEMICAL PHYSICS | 2000年 / 252卷 / 1-2期
关键词：
glass formers; glass transition; fragility; relaxation; TSDC; salol; glycerol; maltitol;
D O I：
10.1016/S0301-0104(99)00354-7
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The technique of thermally stimulated depolarisation currents (TSDC) was used to study the molecular dynamics in the fragile glass formers salol, glycerol and maltitol, The glass transition relaxation was carefully studied in these materials using the thermal sampling (TS) procedure. It is suggested that the amplitude of the deviation from the zero entropy prediction is related to the fragility of the glass and a definition of fragility based on the TSDC results is proposed. Moreover, a p-relaxation was detected and fully characterised in maltitol. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：151 / 163
页数：13
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