Microstructure determination of N-vinyl-2-pyrrolidone/butyl acrylate copolymers by NMR spectroscopy
作者： A.S Brar , Rajeev Kumar
DOI: 10.1016/S0022-2860(02)00173-4
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摘要: Abstract The copolymer composition of N -vinyl-2-pyrrolidone/butyl acrylate (V/B) copolymers was determined from the quantitative 13 C{ 1 H} NMR spectra. monomer reactivity ratios for -vinyl-2-pyrrolidone (V) and butyl (B) were found to be r V =0.11±0.07, B =0.54±0.19, using Kelen–Tudos non-linear least-square error-in-variable (EVM) methods. H spectra these are overlapping complex. complete spectral assignment carbon proton done by employing distortionless enhancement polarization transfer (DEPT) two-dimensional (2D) C– heteronuclear single quantum correlation spectroscopy experiments. 2D total (TOCSY) ( H– homonuclear TOCSY) spectrum used ascertain various geminal vicinal couplings in copolymer.
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