Vapor-Liquid Equilibrium of Copolymer＋ Solvent Systems： Experimental Data and Thermodynamic Modeling with New UNIFAC Groups

为共聚物解决方案的蒸汽液体平衡(VLE ) 数据为几化学进程是必要的。然而，为在出版报告的共聚物答案的 VLE 数据是稀罕的。在这研究，为二进制系统 copolymer+solvent 的试验性的 VLE 数据用一台 gravimetric 吸着仪器被获得。学习系统是 hexane+poly (21% acrylonitrile-co-butadiene ) ， hexane+poly (33% acrylonitrile-co-butadiene ) ， hexane+poly (51% acrylonitrile-co-butadiene ) ， hexane+poly (23% styrene-co-butadiene ) ， hexane+poly (45% styrene-co-butadiene ) ，并且 benzene+poly (44% styrene-co-methyl methacrylate ) 在范围 50 鈥 ? 0 掳 C。试验性的数据为活动系数与 UNIFAC 和 Elbro-FV 组贡献模型一起被相关。功能的组的二个集合被用来在共聚物代表单体：文学组和新建议的组。在试验性、计算的集体部分之间的吝啬的偏差大约 2.4% 与 Elbro- FV 并且当这些组在这建议学习被使用时， 13.3% 与钟一起被观察，并且 3.5% 为 Elbro-FV 并且 13.2% 为钟，文学什么时候组织，被使用。

Vapor-liquid equilibrium （VLE） data for copolymer solutions are necessary for several chemical processes. However, VLE data for copolymer solutions in the published report are rare. In this study, experimental VLE data for binary systems copolymer＋solvent were obtained using a gravimetric-sorption apparatus. The studied systems were hexane＋poly （21% acrylonitrile-co-butadiene）, hexane＋poly （33% acrylonitrile-co-butadiene）, hexane＋poly （51% acrylonitrile-co-butadiene）, hexane＋poly （23% styrene-co-butadiene）, hexane＋poly （45% styrene-co-butadiene）, and benzene＋poly （44% styrene-co-methyl methacrylate） in the range 50-70℃. The experimental data were correlated with the UNIFAC and Elbro-FV group contribution models for the activity coefficient. Two sets of functional groups had been used to represent the monomers in copolymers： literature groups and new proposed groups. The mean deviations between experimental and calculated mass fractions about 2.4% with Elbro- FV and 13.3% with Zhong were observed when the groups proposed in this study were used, and of 3.5% for E1- bro-FV and 13.2% for Zhong, when literature grouns were used.