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The copolymerizations of acrylonitrile and methyl acrylate with propylene, isobutylene, butadiene, styrene, and vinyl chloride and the copolymerizations of methacrylonitrile and methyl methacrylate with propylene in the presence of ethylaluminium dichloride as the complexing agent were studied. When the polar vinyl monomer is not completely complexed by ethylaluminium dichloride in the copolymerizations of acrylonitrile with propylene, isobutylene, and vinyl chloride, and in those of methacrylonitrile and methyl methacrylate with propylene, copolymers rich in polar vinyl monomer were found. In the copolymerization of acrylonitrile with propylene, the polar vinyl monomer content in the copolymer was found to increase with decreasing mole ratio ethylaluminium dichloride/acrylonitrile in the monomer feed. In the copolymerizations of acrylonitrile and methyl acrylate with butadiene and styrene and of methyl acrylate with propylene, isobutylene, and vinyl chloride, copolymers of approximately 1:1 composition are formed. The reactivity of monomers is discussed. The introduction of VOCl3 to the polymerization systems studied was found to cause an enhancement in the copolymerization yield and a decrease of the copolymer intrinsic viscosity; it has not, however, a significant influence on the copolymer composition.
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Florjańczyk et al. (1978) studied this question.
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