浊度滴定法估算杂萘联苯聚芳醚腈三维溶解度参数

摘要

The turbidimetric titration method in several good and poor solvents was used to calculate the three -dimensional solubility parameters of PPEN.The 25 cloud point data were mapped to three -dimensional space to search for a minimum volume ellipsoid for enclosing the sampling data using the KY ( Kumar and Yildirim ) algorithm.This optimized result of the ellipsoid center can be looked on as the three -dimensional solubility parameters of PPEN δd =17.50(MPa)1/2,δp =11.19(MPa)1/2, andδH =10.96(MPa)1/2.The result was tested by using THF solvent , showed to be accurate.The method was applicable to most kinds of polymers and had important directive significance to solve the problem in selection of polymer good solvents.%以杂萘联苯聚芳醚腈为研究对象，分别采用多种良溶剂和不良溶剂进行浊度滴定实验，由KY （ Kumar and Yildirim ）一阶算法对其产生的25个浊点数据进行最小体积闭包椭球拟合，从而确定椭球球心为三维溶解度参数（δd ＝17.50（ MPa ）1/2；δp ＝11.19（ MPa）1/2；δH ＝10.96（ MPa）1/2），椭球包围的区域为聚合物的溶解区域。采用THF作为鉴别溶剂，判定该拟合结果精确可靠。三维溶解度参数方法操作简便，计算简单、选用溶剂少，对聚合物溶剂的选择具有重要的指导意义。