Some volumetric properties of aqueous solution of Polyvinyl alcohol over temperature range 298.15-328.15 K

الملخص EN

The densities of aqueous solution of polyvinyl alcohol with molecular weight (125kg.mol-1) have been determined over temperature range298.15-328.15K.From these data, the volumes for the binary mixtures studied here were calculated.

The volumes have been found linearly dependent on the solute molality (PVA), from this dependence, the partial molar volumes at infinite dilution (V2,0 ) were determined and it was found that the (V2,0 ) concentration independent and slightly increase with increasing temperature.

The thermal expansion coefficient (α1,2 ) of aqueous solution of (PVA) at 298.15K was calculated and it was found that the values of (α 1,2 ) were higher than the value ( α1˚) of pure water.