Phase equilibria in a polystyrene-poly(butyl acrylate) system

Abstract

Phase equilibria in polystyrene-poly(n-butyl acrylate) systems containing polystyrene of various molecular masses were studied for the first time via optical interferometry at temperatures between 280 and 500 K. The phase diagrams of the systems were obtained, the pair interaction parameters were determined, and the dependences of the parameters on the molecular mass of polystyrene and temperature were found. The possibility of thermodynamic analysis of phase diagrams in terms of the classical Flory-Huggins-Scott theory and the possibility to predict generalized phase diagrams of polystyrene-poly(n-butyl acrylate) systems on the basis of the experimental values of the pair interaction parameters were shown.