Theoretical Phase Diagram Calculation Based on a Compressible Regular Solution Model for Water-Dimethylsulfoxide- Polyethersulfone Ternary System

Recently, a Compressible Regular Solution (CRS) model has been used to predict the ternary phase diagram of polymeric membranes prepared via phase inversion method. In this research, for water/dimethylsulfoxide/polyethersulfone membrane forming system, binodal and spinodal curves were calculated based on the CRS model and so, the critical point was computed. To determine experimental cloud point data, the titration method was used. According to the constructed theoretical ternary phase diagram of this system, the results were successfully correlated with the experimental cloud point data.