The copolymerization of 4-vinyl pyridine (4-VP) with acrylamide (AM) has been realized by radical copolymerixation in solution using potassium porsulfate as initiator．The effects of acetone／water and DMF／water solvent systems

comonomer concentration

polymerization temperature

polymerization time and initiator amount on the conversion of the polymerization and molecular weight were investigated in detail．The results showed that the mixed solvent DMF／water=1 (V/V) is suitable for the copolymerization of 4-VP and AM．The composition of copolymer was determined by ultraviolet spectrophotometry and the structure of copolymer was characterized and verified by FTIR and 13C-NMR．Finally

The monomer reactivity ratios of 4-VP and AM were obtained with Kelen-Tudos method

r4-VP=0.644

rAM=0.371．