COPOLYMERS OF CYANO COMPOUNDS WITH CAPTODATIVE MONOMERS - STUDIES OF THEIR MICROSTRUCTURES

Copolymers of vinylidene cyanide, methacrylonitrile, and acrylonitrile with various captodative monomers such as cyanovinyl acetate, methyl alpha-acetoxyacrylate or methyl 1-(methoxy carbonyl) vinyl carbonate w ere synthesized by radical copolymerization. The microstructures of th ese copolymers were studied by means of C-13 NMR. The copolymers of vi nylidene cyanide are rich in alternating structure, and the copolymers of methacrylonitrile and acrylonitrile are rather statistical than al ternating. The measurements of reactivity ratios for three copolymeriz ation reactions, vinylidene cyanide, methacrylonitrile, and acrylonitr ile with methyl alpha-acetoxyacrylate, confirm these conclusions.