A new activity model for polymer-solvent systems
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HUANG Yu;CHENG Zhenfeng;LIU Qinglin
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黄宇;程振锋;刘庆林
厦门大学化学化工学院化学工程与生物工程系, 福建 厦门 361005
Abstract: A new molar excess Gibbs energy (GE) expression for the correlation of vapor-liquid phase behavior for polymer solutions was developed from the Gibbs-Helmholtz relation, and a new activity model for polymer solutions based on the GE expression was then derived by accounting for the free volume effect.The model includes a combinatorial part, a residual part and also a free volume part.The calculated results by the present method were compared with those from the EFV,UFV and UNIFAC models.The average absolute deviation of solvent activities in 14 polymer solutions was 8.41% for EFV, 7.74% for UFV, 19.05% for UNIFAC and 3.52% for the present model.It is shown that the present model yields improved results over the other models and is able to describe the phase behavior for some polymer solutions over a wide range of concentration.
HUANG Yu;CHENG Zhenfeng;LIU Qinglin.
黄宇;程振锋;刘庆林 . 聚合物-溶剂体系中溶剂的活度模型 [J]. CIESC Journal.
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https://hgxb.cip.com.cn/EN/Y2006/V57/I9/2039