Measurement and correlation of density and viscosity of polyvinylpyrrolidone solutions in alcohols at different temperatures

The density and viscosity values of (polyvinypyrrolidone + methanol, + ethanol, or + 1-propanol) solutions have been measured at T = (298.15, 308.15, and 318.15) K. Apparent specific volume and partial specific volume of the polymer and solvent have been computed from the experimental values. Apparent specific volume values have been correlated with the suitable polynomial equations. A simple exponential equation and Eyring-NRTL viscosity model in the modified form have adequately been used for the correlation of the viscosity values.