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 ?Kexp , (kappa) and the value of K12 a dimensionless quantity. The positive values of ?Kexp and , and the higher values of K12 than KH value of the individual polymers reveals the miscibility of PVP/PVA blends.
SHER AKBAR ,GHULAM SARWAR ,
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