Solvent effects in radical copolymerization. IV. N‐methyl acrylamide

The influence of different solvents on the copolymerization behaviour of N‐methyl acrylamide with styrene and methyl methacrylate has been investigated. The calculated relative reactivities of N‐methyl acrylamide towards both the polystyryl and poly(methyl methacrylyl) radicals (1/r2) are practically unaffected by the reaction medium; on the contrary, the relative reactivities of both styrene and methyl methacrylate monomers towards the poly(N‐methyl acrylamide) radical (1/r1) are remarkably influenced by the reaction solvents. A comparison both with unsubstituted and disubstituted acrylamides polymerized under the same conditions has been made.