聚合物－聚合物双水相系统相平衡计算

Calculation of phase equilibrium for aqueous two-phase polymer systems

利用Ｃａｂｅｘｚａｓ模型，对１４个不同平均分子量的聚乙二醇－葡聚糖－水双水相系统相平衡作了计算。与文献值比较，结果尚可。引入相互作用参数后，得到了修正的Ｃａｂｅｚａｓ模型，用此模型关联上述各双水相系统相平衡，精度有显著提高。

Based on the Cabezas model,the phase equilibrium data of fourteen PEC-Dcxtran-water aqueous two-phase polymer systems with different molecular weight were calculated. Some results were in fair agreement with the experimental data. By introducing the interaction parameter to the model,a modified Cabezas model was presented. When the phase equilibrium data of above mentioned systems were calculated by the modified model, the accuracy of calculation was increased effectively.