Characterization of glycidyl methacrylate/styrene copolymers by one- and two-dimensional NMR spectroscopy

Glycidylmethacrylate/styrene copolymers of different compositions were prepared by free radical bulk polymerisation using benzoyl peroxide as an initiator. Copolymer composition was obtained from quantitative Carbon-13 NMR spectroscopy. Reactivity ratios for comonomers were calculated using the Kelen–Tudos (KT) and non-linear error in variable methods (EVM). The reactivity ratios obtained from KT and EVM are found to be rG=0.56±0.1, rS=0.44±0.07 and rG=0.60, rS=0.48 respectively. The triad sequence distribution in terms of G and S centered triad were obtained from 13C{1H} NMR spectroscopy. Complete spectral assignment of 13C and 1H-NMR spectra were done with the help of distortionless enhancement by polarization transfer and 2D 13C–1H heteronuclear single quantum coherence.