PREPARATION AND POLYMERIZATION OF VINYL MONOMERS CONTAINING A HETEROCYCLIC PENDANT GROUP

New vinyl monomers having an isoxazole heterocyclic group were synthes ized and were polymerized in dimethylformamide using azobisisobutyroni trile as a free radical initiator. The dependence of the rate of polym erization on monomer and initiator concentrations was determined, as w ell as the activation energy of polymerization. The addition of Lewis acid was found to affect the rate of polymerization. The prepared mono mers were copolymerized with styrene, vinyl acetate, acrylonitrile and methyl methacrylate. The monomer reactivity ratios of all the systems were determined by linear and non-linear methods, and the Q and e val ues for the monomers were calculated by considering the four copolymer ization systems in each case.