Thermo-viscoelasticity of polymer melts: experiments and modeling

被引：0
作者：
A. D. Drozdov
E. A. Jensen
J. de C. Christiansen
机构：
[1] Ben-Gurion University of the Negev,Department of Chemical Engineering
[2] Aalborg University,Department of Production
来源：
Acta Mechanica | 2008年 / 197卷
关键词：
Shear Stress; Shear Rate; Shear Test; Deformation Gradient; Relaxation Test;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Observations are reported on polyethylene melt in start-up shear tests with various strain rates in the interval from 1 to 8 s−1 and in shear relaxation tests with large strains at various temperatures ranging from 160 to 200 °C. Based on a concept of polymer networks with sliding constrained junctions, a constitutive model is developed for the thermo-mechanical behavior of polymer melts at finite three-dimensional deformations. Adjustable parameters in the stress–strain relations are found by fitting the experimental data. Characteristic features of the mechanical response of polymer melts in transient shear tests and oscillatory tests with small and large amplitudes are studied numerically.
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页码：211 / 245
页数：34
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