Check of the temperature- and pressure-dependent Cohen-Grest equation

被引：28

作者：

Corezzi, S

Capaccioli, S

Casalini, R

Fioretto, D

Paluch, M

Rolla, PA

机构：

[1] Univ Perugia, INFM, I-06100 Perugia, Italy

[2] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy

[3] Univ Pisa, INFM, I-56127 Pisa, Italy

[4] Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy

[5] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 320卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(00)00185-8

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 dynamics of a fragile glass-farmer (diglycidyl ether of bisphenol-A) has been studied by wideband dielectric spectroscopy down to the temperature-induced and the pressure-induced glass transition. A full check of the temperature and pressure dependence of the structural relaxation time, predicted within an extended free volume model by the generalised Cohen-Grest function, is reported. From our investigation it is evident that this function suitably describes the structural relaxation time at ambient pressure, but on the other hand, it strikingly fails in describing the isothermal data under variable pressure. (C) 2000 Elsevier Science B.V. All rights reserved.

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页码：113 / 117

页数：5

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