Vapour-liquid equilibria in the polymer+solvent system containing lower concentrations of solute at normal or reduced pressures

摘要

Vapour-liquid equilibria have been determined in the polymer. +. solvent systems, namely the poly(acrylic acid). +. water, and poly(methyl methacrylate). +. acetone system. Each system has been measured at three isothermal conditions. An all-glass microebulliometer with circulation of the liquid phase was used for dynamic measurements of total pressure over liquid mixtures. The determined data were correlated with the UNIQUAC equation.