Effects of Concentration, Temperature and Solvent Composition on the Partial Molar Volumes of Sodium Polystyrenesulphonate in Methanol-Water Solvent Media

Abstract

Precise measurements on the density of sodium polystyrenesulphonate solutions in methanol-water mixed solvent media containing 8, 16, and 25 weight per cent of methanol at 308.15, 318.15, and 323.15 K are reported. The degree of substitution of sodium polystyrenesulphonate used is 1, and the concentrations are varied from 1 ×10-2 to 3.8 ×10-2 monomol.l-1. The results showed a slight increase on the partial molar volumes with increasing polyelectrolyte concentration. The partial 0 molar volumes of the polyelectrolyte at infinite dilution, ( V) were determined. The effects of the temperature and solvent composition on the partial molar volumes are also investigated