Fragility - Density of state and relaxation processes in polymeric materials

被引：5
|
作者：
Saiter, A. [1 ]
Bureau, E. [1 ]
Cabot, C. [1 ]
Saiter, J. M. [1 ]
机构：
[1] Univ Rouen, UMR 6522, Lab PBM, Equipe LECAP,Fac Sci, F-76801 St Etienne, France
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 2006年 / 352卷 / 42-49期
关键词：
glass transition; calorimetry; enthalpy relaxation; viscosity and relaxation; fragility; RANDOM-WALK MODEL; SUPERCOOLED MELTS; GLASS; STYRENE; TEMPERATURE; DEPENDENCE; LIQUIDS; BLEND;
D O I：
10.1016/j.jnoncrysol.2006.02.177
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The values of diifferent parameters defined in the Random Walk Model (RWM) as: the Density of Possible Metastable States g(E), the metastable state Dumber N-E, the apparent activation energy E-a/R and, the Cooperative Rearranging Regions distribution sigma, have been calculated at T-g for two polymeric sample families (PVC, EVA(70), PVC/EVA(70) blend, and Unsaturated Polyester Resin samples). We show that these quantities allow to describe the configurational space, and we verify that the evolutions found for these different parameters versus the fragility are in a good agreement with the Strong-Fragile concept predictions. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：5067 / 5071
页数：5
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