Copolymers of α,β-unsaturated ketones with dienes: Establishment of alternation by 13C NMR

Abstract

13C NMR spectroscopy has been used to study the microstructure of copolymers of isoprene and alkylvinylketones. It has been shown that these copolymers have a tendency to alternation during radical copolymerization. Statistical treatment of the data obtained has shown that the characteristics of the polymer chain propagation obey first-order Markov stat-istics and the average length of the alternating section depends on the alkyl substituent in the α,β-unsaturated ketone.