Solvent Effect on the Radical Copolymerizability of Styrene with p-Substituted Methyl Cinnamates

Abstract

Abstract The radical co polymerization of styrene with p-substituted methyl cinnamates was carried out in benzene, acetonitrile, and acetic acid at 60 and 80°C. The p values obtained by plotting the values of log 1/r1 against a values with the modified Hammett's equation decreased in the order benzene, acetonitrile, and acetic acid. The activation energy and entropy in copolymerization were also estimated. The results are discussed in terms of the different degrees of solvation between the ground state and the transition state.