Sequence determination in methyl methacrylate舑n-butyl methacrylate copolymers by 13c nmr spectroscopy

Abstract

Methyl methacrylate (MMA) and n-butyl methacrylate (n-BuMA) were bulk copolymerized at 70°C using benzoyl peroxide as an initiator. The composition of the copolymer samples was estimated by 1H NMR spectroscopic technique. Reactivity ratios were calculated by Tüdös method. 13C [1H] NMR spectra were used to study the monomer sequence distribution in copolymers. Various triads fractions were calculated by using the carbonyl resonance. The experimental triad concentrations showed good agreement with calculated values from Bernoullian and Harwood statistical programs. © 1988 The Society of Polymer Science, Japan.