VAPOR-LIQUID EQUILIBRIA FOR MIXTURES OF TOLUENE AND POLYSTYRENE WITH DIFFERENT MOLECULAR WEIGHTS

作     者：王琨 陈一锋 傅金彦 胡英 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：1993年第1卷第2期

页      面：4-12页

核心收录：

学科分类：0817[工学-化学工程与技术] 08[工学] 

主　　题：vapor-liquid equilibria polymer solution Flory-Huggins parameter polystyrene toluene 

摘      要：An experimental system for measuring the VLE of polymer solutions based on the staticvapor-pressure method has been established,VLE data for mixtures of toluene and polystyrene withdifferent molecular weight covering a wide range from 2.98×10~3 to 3.84×10~6 were obtained at 35℃.The reduced pressure p/p°versus weight fraction W plot is found to be independent on the molecularweight of the polymer within the experimental *** activity coefficients are also independenton the molecular ***,for the Flory-Huggins interaction parameter x,not only a strongconcentration dependence is observed,but also the molecular weight of the polymer exerts ***,the parameter x slightly increases as the molecular weight of the polymer decreasesespecially when the molecular weight is *** dependence of the parameter x on the molecularweight can be neglected when the molecular weight of polymer is greater than 1.00×10~4.