VAPOR-LIQUID-EQUILIBRIUM PROPERTIES FOR POLYMER-SOLVENT MIXTURES USING THE PERTURBED SOFT CHAIN THEORY

The Perturbed Soft Chain Theory (PSCT) has been evaluated extensively for application to vapor-liquid equilibrium calculations in polymer-so lvent systems. Pure compound parameters for many common solvents and p olymers have been determined by using experimental data from two major data bases. Predictive and correlative capabilities of the PSCT have been compared for non-polar, non-polar/polar, and polar/polar systems over the entire concentration range. The model can represent the mixtu re experimental data behavior when a small binary interaction paramete r is introduced to correct for energetic interactions. An extensive da ta base of binary interactions parameters for more than 50 polymer-sol vent systems has been generated. The effects on the mixture calculatio ns of uncertainties in determining the pure compound parameters have a lso been analyzed.