Vetere's report on three empirical equations to predict the equilibrium properties of polymer/small-molecule solutions including the location of the upper critical solution temperature (UCST) for liquid-liquid demixing in the (T,r) projection is reviewed. Here r is the effective polymerization number, r = V2/V1, where V2 is the molar volume of the polymer and V1 that of the solvent and T is the temperature. The validity of the proposed correlating equations was checked with UCST data for 14 different systems. The differences between experimental and predicted UCSTs are too large to permit the Vetere method for reliable prediction of UCST of polymer/small molecule mixtures.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering