Methacrylonitrile-vinylidene chloride-butyl acrylate terpolymers: Monomer sequence determination by one- and two-dimensional NMR spectroscopy

Abstract

Methacrylonitrile-vinylidene chloride-butyl acrylate (M/V/B) terpolymers of different composition have been prepared by bulk polymerization using benzoyl peroxide as an initiator. The terpolymer compositions have been determined from quantitative assessment of the respective ¹³C {¹H} NMR spectra and the observed values compared with the theoretical values obtained from Alfrey-Goldfinger's equation. The overlapping methine and methylene carbon resonances of terpolymers have been differentiated by DEPT experiments. The quaternary carbon resonances of M/V/B terpolymers have been assigned to triad compositional sequences. The complete ¹H and ¹³C{¹H} NMR spectra of terpolymers have been assigned without ambiguity with the help of 2D HSQC MR spectroscopic techniques.