A Modified UNIFAC Model for Polymer Solutions

作者：Cheng Zhenfeng^*; Li Changyou

来源：Asian Journal of Chemistry, 2013, 25(2): 731-734.

DOI：10.14233/ajchem.2013.12619

• Polymer solution
• van der Waals partition function
• UNIFAC model
• Entropic-FV-1.2 model

For not considering the effect of free volume, the predictive results of the UNIFAC model in polymer solution systems are not acceptable. To improve the predictive accuracy, a free-volume term derived from the van der Waals partition function is added into the UNIFAC model, experimental data of 19 polymer solution systems are used to test the modified model, which is compared with the UNIFAC model, the UNIFAC-FV model and the Entropic-FV-1.2 model, and the results showed that the modified model is mostly better than other models. Furthermore, the model is valid for the whole range of polymer concentration (from dilute solution up to saturation).

• 出版日期2013-2
• 单位湖北文理学院; 河南城建学院