The crystallization behaviors and thermalproperties of the blends composed of poly (vinylalcohol-n-vinylpyrrolidone) (P(VA—VP)) hydrolyzed from poly (vinylacetate-n-vinylpyrrolidone) (P(VAC—VP)) and polyvinyl alcohol (PVA) have been studied by means of DSC

The relationship between the glass transition temperatures of the blends and their compositions is fitted for the Fox equation quite well

suggesting that the blends are compatible. The results show that the melting point

the enthalpy of fusion

the crystal lamella thickness and the crystallinity of PVA decrease with an increase in P(VA—VP) content in the blends

but the mechanism of nucleation and the growth of the PVA crystals do not change. The effects of the blend composition on the half time and the kinetic rate constant of crystallization also have been discussed