Morphological characterization of poly(N-vinylcarbazole) obtained with asymmetrically stereoselective polymerization

The morphological characterizations of poly(N-vinylcarbazole)(PVCZ) obtaine d by asymmetrically stereoselective polymerization were studied using x-ray diffraction pattern, DSC and GPC. The results show that the PVCZs have low er crystallinities (11.0 similar to 18.6%) and lower melting heats (2.2 sim ilar to 7.5 J/g), but the degree of crystallinities of the PVCZ samples obt ained using the organic salts (acid) with chiral or stereodifferentiating l igands are higher than that using radical and general protonic initiator. I t has shown that the crystallization is directly related to the packing den sity of the hexagonal array of the rodlike molecules formed from the helica l chain.