Local elastic expansion model for viscous-flow activation energies of glass-forming molecular liquids

被引：276

作者：

Dyre, JC

Olsen, NB

Christensen, T

机构：

[1] Department of Mathematics and Physics (IMFUFA), Roskilde University, DK-4000 Roskilde

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.53.2171

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A model for the viscosity of glass-forming molecular liquids is proposed in which a ''flow event'' requires a local volume increase. The activation energy for a flow event is identified with the work done in shoving aside the surrounding liquid; this work is proportional to the high-frequency shear modulus, which increases as the temperature decreases. The model is confirmed by experiments on a number of molecular liquids.

引用

收藏

页码：2171 / 2174

页数：4

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