Relationships between polymer interaction parameters

Abstract

Experimental methods that determine binary polymer-polymer χ interaction parameters may probe the mixture's free energy, its first derivative, or its second derivative. In general, there are four different χ parameters that are required to describe a binary polymer mixture, but if one is determined experimentally, the other three can be calculated. This allows for the determination of both the spinodal and two-phase coexistence curves. Theoretical Henry's law constants that govern gas sorption in polymers are derived which can be used to facilitate the determination of polymer-polymer interaction parameters by inverse gas chromatography. © 1989.