Thioglycolic Acid → Methyl 2-methylprop-2-enoate;styrene

Participants

Reaction Steps

A monomeric mixture of 45 parts of methyl methacrylate and 55 parts of styrene added with thioglycolic acid as a chain transfer agent was bulk polymerized in the presence of azobisisobutyronitrile as an initiator to obtain an oligomer having a molecular weight of about 2,000 after purification by reprecipitation. The resulting oligomer was dissolved in xylene and added with glycidyl methacrylate in an amount of 1.3 times equivalent of carboxyl groups contained in the oligomer, a catalytic amount of N,N-dimethyldodecylamine and a trace amount of a radical polymerization inhibitor. Then, the mixture was reacted at 120° C. for 5 hours and purified by reprecipitation to obtain a methyl methacrylate/styrene copolymer having vinyl groups at chain ends.

Provenance & Evidence