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

✍ Scribed by A. S. Brar; Rajeev Kumar

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 317 KB
• Volume: 84
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.10186

✦ Synopsis

Abstract

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