PS/溶剂体系气液平衡研究  

The Study of Vapor-Liquid Equilibria for Polymer/Solvents by Using Gas-Liquid Chromatography

作　　者：谢建军[1] 潘勤敏[2] 潘祖仁[2] 

机构地区：[1]湘潭大学高分子材料与工程研究所,湘潭411105 [2]浙江大学高分子科学与工程研究所

出　　处：《湘潭大学自然科学学报》2000年第3期40-45,共6页Natural Science Journal of Xiangtan University

基　　金：国家自然科学基金!资助项目 (2 96 70 377)

摘　　要：:采用气液色谱法测定了PS/溶剂在不同温度下无限稀溶剂活度系数和Flory -Huggins相互作用参数 .应用UNIFAC和UNIFAC -FV模型对PS/溶剂体系中无限稀溶剂活度系数进行了估算 .结果表明 ,UNIFAC -FV模型能较好地预测PS/烃溶剂体系中无限稀溶剂活度系数 ,而UNIFAC模型则较差 .The weight fraction infinite dilution activity coefficient,and Flory-Huggins interaction parameter, χ , have been determined for polystyrene(PS) / solvents by using gas-liquid chromatography. Ω ∞ 1 and χ decreased with the increasing temperature. And Ω ∞ 1 is also estimated by UNIFAC and UNIFAC-FV models. The result shows that UNIFAC-FV model can be used to estimate Ω ∞ 1 for PS/solvent systems by adjusting model parameter(number of external free degree), c , for the different solvents, while UNIFAC model can not be used to.

关 键 词：气液平衡 气液色谱法 活度系数 聚苯乙烯/溶剂 

分 类 号：O632.7[理学—高分子化学] O657.7[理学—化学]