Microstructure of glycidylmethacrylate/vinyl acetate copolymers by two-dimensional nuclear magnetic resonance spectroscopy

Glycidylmethacrylate/vinyl acetate copolymers were prepared by solution polymerization with benzene as a solvent and benzoyl peroxide as an initiator. Copolymer compositions were determined from H-1 NMR spectra, and comonomer reactivity ratios were determined by the Kelen-Tudos (KT) method and the nonlinear least-squares error-in-variable method (EVM). The reactivity ratios obtained from KT and EVM were r(G) = 37.4 +/- 12.0 and r(V) = 0.036 +/- 0.019 and r(G) = 35.2 and r(V) = 0.03, respectively. Complete spectral assignments of C-13 and H-1 NMR spectra were done with the help of distortionless enhancement by polarization transfer and two-dimensional C-13-H-1 heteronuclear single quantum coherence and total correlation spectroscopy. The methyl, methine, and methylene carbon resonance showed both stereochemical and compositional sensitivity. (C) 2001 John Wiley & Sons, Inc.