chloroform 20 ml and filtered through 0 2 u03bcm teflon filter the filtrate was dropped into 250 ml of methanol to precipitate out while stirring the precipitate was filtered through glass filter to collect the polymer product which was further dried on vacuum oven at 60 u00b0 c for 24 hr the yield was 87 the prepared poly 2 4 vinyl phenyl pyridine co 9 vinylcarbozole copolymer having 20 content of 2 4 vinyl phenyl pyridine was analyzed to have 43 000 g mole of number average molecular weight 71 000 g mole of weight average molecular weight and 1 65 of molecular weight distribution m w m n 1 h nmr 13 c nmr ft ir gc and mass spectra were shown in fig1 16 by the same procedure as described in example 7 poly 2 4 vinyl phenyl pyridine co 4 9 carbozoyl methyl styrene copolymer having 20 content of 2 4 vinyl phenyl pyridine was prepared except using 4 9 carbazolyl methyl styrene instead of 9 vinylcarbazole in 80 by the same procedure as described in example 7 poly 2 4 vinyl phenyl pyridine co 3 vinyl 9 ethyl carbozole copolymer having 20 content of 2 4 vinyl phenyl pyridine was prepared except using 2 n carbazoyl ethyl methacrylate instead of 9 vinylcarbazole in 87 by the same procedure as described in example 7 poly 2 4 vinyl phenyl pyridine co 2 vinyl 9 ethyl carbozole copolymer having 20 content of 2 4 vinyl phenyl pyridine was prepared except using 3 vinyl 9 ethyl carbazole.