Copolymers of substituted styrenes with vinylidene cyanide or methylvinylidene cyanide. ¹³C NMR studies of their microstructures

Abstract

Abstract Various copolymers of vinylidene cyanide ( 1a ) and methylvinylidene cyanide ( 1b ) with substituted styrenes ( 2a–g ) were synthesized by radical copolymerization, and their microstructures were studied by 13 C NMR spectroscopy. The copolymers of vinylidene cyanide with substituted styrenes have a perfectly alternating structure, but the copolymers of methylvinylidene cyanide are rich in alternating structure and might contain a minor part of poly(substituted styrene) as blocks or as homopolymers. A distinction between the two possibilities was not possible.