Three allyl ethers, viz. the ethyl, 2-hydroxyethyl and phenyl compounds, ha
ve been examined as additives in radical polymerizations of styrene (STY),
methyl methacrylate (MMA) and acrylonitrile (ACN) at 60 degreesC using azob
isisobutyronitrile as initiator. As retarders and transfer agents, the ethe
rs are considerably more effective with ACN than with the other monomers. A
llyl phenyl ether engages in significant copolymerization with ACN and slig
ht copolymerization with MMA; there is negligible incorporation in polySTY.