Vapour–Liquid Equilibria in the Polystyrene + Toluene System at Higher Concentrations of Solvent

This paper represents a continuation of the series concerning experimental determination of vapour–liquid equilibria (VLE) in diluted polymer + solvent systems. In the previous papers we dealt with the polymeric flow improvers + toluene, hexane, chloroform1,2, poly(acrylic acid) + water3, poly(methyl methacrylate) + acetone3, and poly(methyl methacrylate) + 2-butanone4 systems. The aim of this study is to provide new – and always welcome – experimental data on vapour–liquid equilibria (VLE) in the polystyrene (PS) + toluene system, determined under isothermal conditions at 363.15, 373.15, and 383.15 K using ebulliometric techniques infrequently exploited for the investigation of polymer solutions. Moreover, the three prediction models were tested against the new experimental data.