A study of sequence distribution of chloroprene and methyl methacrylate copolymers by 1H‐NMR

Abstract

AbstractThe 1H‐NMR spectra of poly(chloroprene‐methyl methacrylate) which was copolymerized with ethylaluminum dichloride (EtAlCl2) and vanadyl trichloride (VOCl3) were measured with the radical copolymers. The split signals of the OCH3 and α‐CH3 protons in the spectra were assigned to triads and pentads with methyl methacrylate as a center, respectively, and the fomer concentrations were in reasonable agreement with the latter concentrations in triads. Moreover, it was found that the α‐CH3 signal was split into peaks of different tacticity when the mole fractional ratio of methyl methacrylate (MMA) to chloroprene (CP) in the copolymer was approximately 3.0 or greater.