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Entropic-FV(EFV)修正模型是对原模型的自由体积分数项进行修改而获得,前者与后者具有相同的统计力学基础,且表达式简单,无需增加模型参数。将其用于聚乙二醇/甲醇二元体系中组分活度的计算,或与UNIQUAC-HB模型结合对聚乙烯醇膜/乙二醇/水和聚氨酯/正己烷/苯三元体系的溶胀平衡组成进行预测,并与EFV和原修正模型的预测结果以及文献值进行比较,结果显示该模型预测的准确度最高、稳定性较好。
The modified Entropic-FV (EFV) model is obtained by modifying the free volume fraction of the original model. The former has the same statistical mechanics basis as the latter, and the expression is simple without adding any model parameters. It was used for the calculation of the activity of components in the polyethylene glycol / methanol binary system or in combination with the UNIQUAC-HB model for the polyvinyl alcohol / ethylene glycol / water and polyurethane / n-hexane / benzene ternary systems The results show that the model has the highest prediction accuracy and the better stability.