Prediction of Polymer-Polymer Miscibility with a Group Contribution Method.

摘要

This paper summarizes the use of a group contribution method for estimating the heat of mixing of two polymers and, therefore, their phase behavior. This method uses similar groups of atoms as the popular UNIFAC method; however, the present approach differs there-after in two important regards. First, the data base consists of the heat of mixing for low molecular weight liquids that are accurately known. Second, the theory attempts to account for non-random mixing effects using an entropy parameter in a Guggenheim quasi-chemical approach. Keywords: Polymers, Blends, Miscibility, Thermodynamics, Heats of mixing.