Title: High Resolution NMR Study of Vinyl Chloride-Ethylene Copolymers
Abstract: Abstract The high resolution NMR spectra of vinyl chloride-ethylene copolymers obtained by trialkylboron catalyst have been analyzed. The copolymer composition could be determined from the resonance peak area, and the monomer reactivity ratios thus obtained were in good consistency with those determined from the results of elementary analysis. The fine structure of the copolymers have been elucidated in terms of the run number concept, and the distribution of dyads as well as the average sequence lengths of the monomer unit have been determined. It was found that the observed values fitted theoretical values, indicating that a terminal model holds in this copolymerization.