Sequencing of N ‐vinyl‐2‐pyrrolidone/glycidyl methacrylate copolymers by one‐dimensional and two‐dimensional nuclear magnetic resonance spectroscopy

Copolymers of N ‐vinyl‐2‐pyrrolidone (V) and glycidyl methacrylate (G) monomers of different compositions were prepared by free‐radical solution polymerization. The copolymer composition of these copolymers was determined with 1 H‐NMR spectra. The reactivity ratios calculated from the Kelen–Tudos and nonlinear least‐square error‐in‐variable methods were r V = 0.03 ± 0.01 and r G = 5.05 ± 0.84 and r V = 0.02 and r G = 4.72, respectively. The triad sequence distribution in terms of V and G centered triads was determined from 13 C{ 1 H}‐NMR spectroscopy. The complete spectral assignment of 13 C{ 1 H}‐ and 1 H‐NMR spectra was performed with the help of distortionless enhancement by polarization transfer and two‐dimensional 13 C– 1 H heteronuclear single quantum coherence. The 1 H– 1 H couplings were explained with total correlation spectroscopy and nuclear Overhauser enhancement spectroscopy spectra. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 50–60, 2002; DOI 10.1002/app.10186