Stress effects on mass transport in polymers: a model for volume relaxation

被引：7

作者：

Piccinini, E ^{[1
]}

Gardini, D ^{[1
]}

Doghieri, F ^{[1
]}

机构：

[1] Univ Bologna, Alma Mater Studiorum, Dipartimento Ingn Chim Mineraria & Tecnol Ambient, I-40136 Bologna, Italy

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2006年 / 37卷 / 04期

关键词：

volume relaxation; sorption; glas polymers; NET-GP model;

D O I：

10.1016/j.compositesa.2005.05.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A model is introduced here for volume relaxation in glassy polymers, induced by sorption of low molecular weight species. The model relies on description of thermodynamic properties of glassy mixtures obtained through NET-GP model and it considers simple linear viscoelastic laws to interpret the stress-strain relation for the polymeric material. Results for the case of sorption kinetics in constant fugacity processes, obtained from the model, are compared with experimental values for vapour sorption in glassy polymeric microspheres. Satisfactory representations were obtained both for instant solute content measured in experimental run and for mass uptake registered in 'relaxation stage' of sorption processes. Viscosity data obtained from fitting of sorption experimental results are finally discussed in terms of temperature dependence and compared with values obtained form purely mechanical volume relaxation experiments. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：546 / 555

页数：10

共 18 条

[1] Solubility in glassy polymers: Correlations through the nonequilibrium lattice fluid model [J].