ON THE EFFECT OF PHASE RATIO ON THE EFFICIENCY OF RADIATION GRAFTING IN LATEX SYSTEMS

The effect of aqueous phase on the efficiency of radiation-induced gra ft copolymerization of styrene and acrylonitrile onto butyl acrylate-a crylonitrile copolymer and butyl rubber in latexes was studied. The mo lecular mass of the butyl acrylate-acrylonitrile copolymer decreases a nd the grafting efficiency increases with increase in the ratio of the aqueous phase, thus suggesting that grafting sites emerge primarily d ue to indirect action of gamma-radiation. This indirect action cannot be explained in terms of interaction of primary products of water radi olysis with polymer molecules in latex particles.