Copolymerization of cationic monomers with acrylamide in an aqueous solution

Abstract The radical copolymerizations of commercially available cationic monomers (M 1 ) with acrylamide (M 2 ) have been investigated at pH 6.1 in aqueous solutions. The cationic groups in copolymers were analyzed by a colloid titration method and the reactivity ratios were determined by the Fineman–Ross method. The values of r 1 and r 2 were 1.71 and 0.25 for methacryloyloxyethyltrimethylammonium chlorideM 2 , 1.68 and 1.26 for N , N ‐dimethylaminoethylmethacrylateM 2 , 1.13 and 0.57 for methacrylamidopropyltrimethylammonium chlorideM 2 , 1.10 and 0.47 for N , N ‐dimethylaminopropylmethacrylateM 2 , 0.47 and 0.95 for N , N ‐dimethylaminopropylacrylamideM 2 , 0.48 and 0.64 for acryloyloxyethyltrimethylammonium chloride‐M 2 , and 0.58 and 6.7 for dimethyldiallylammonium chloride‐M 2 systems. The Alfrey‐Price Q and e values were calculated and the linear relationship between log Q and ultraviolet absorption maxima of cationic monomers was found.