Study of hydrodynamic and non-hydrodynamic interaction parameters for water/PVP/PVA ternary system by solution viscometry

Polymer-polymer interaction parameters from a water soluble polymer-blend solution have been determined by viscometry at 25°c. the ternary system assayed is distilled water poly (n-vinyl-2-pyrrolidone) (pvp)/poly (vinyl alcohol) (pva),the intrinsic viscosity and the viscometric interaction parameters have been determined for the water/pvp/pva ternary system. experimental results obey the huggins equation. degree of miscibility of this ternary system was estimated on the basis of the signs of δk exp,κ (kappa) and the value of k12 a dimensionless quantity. the positive values of δkesp and k,and the higher values of k12 than kh value of the individual polymers reveals the miscibility of pvp/pva blends.