A Group Contribution-Based Model to Predict Organic Solvent Diffusivities in Amorphous Rubbery Polymers

被引:0
|
作者
Hong-ling Lv
Bao-guo Wang
Ji-chu Yang
机构
[1] Tsinghua University,Department of Chemical Engineering
来源
Polymer Journal | 2007年 / 39卷
关键词
Diffusion Coefficient; Free Volume; Group Contribution; Polymer; Organic Solvent; Equation-of-State (EOS);
D O I
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中图分类号
学科分类号
摘要
A modified free-volume model was developed to predict solvent diffusion coefficients in amorphous rubbery polymers, with the introduction of the Sanchez-Lacombe equation-of-state (EOS) into the free-volume theory. The characteristic parameters of the EOS are the only introduced parameters, and they can be determined with the knowledge of polymer structural units. Since all of the parameters with respect to the polymer can be determined by the group contribution method, this model provides feasibility to correlate the solvent diffusivities with polymer structures, without the knowledge of any diffusion or viscoelastic data. The calculations of infinite dilution diffusion coefficients and solvent self-diffusion coefficients for seven kinds of organic solvents in seven kinds of polymers were generally consistent with the published experimental results.
引用
收藏
页码:1167 / 1171
页数:4
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