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Compositional and configurational sequence determination of methacrylonitrile–vinylidene chloride copolymers by nuclear magnetic resonance spectroscopy
Author(s) -
Brar A. S.,
Pradhan D. R.,
Hooda Sunita
Publication year - 2005
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.21455
Subject(s) - copolymer , polymer chemistry , methacrylonitrile , materials science , polymerization , monomer , spectroscopy , reactivity (psychology) , chemistry , analytical chemistry (journal) , polymer , organic chemistry , composite material , physics , acrylonitrile , medicine , alternative medicine , pathology , quantum mechanics
Methacrylonitrile–vinylidene chloride (M/V) copolymers of different composition were prepared by bulk polymerization using benzoyl peroxide as an initiator under nitrogen atmosphere in a sealed tube. The copolymer composition was determined from quantitative 13 C[ 1 H] NMR spectra. The reactivity ratios for M/V copolymers obtained from a linear Kelen–Tudos method and nonlinear error‐in‐variables method are r M = 2.47 ± 0.14, r V = 0.40 ± 0.02, and r M = 2.43, r V = 0.39, respectively. The complete spectral assignment in term of compositional and conformational sequences of these copolymers were done with the help of distortionless enhancement by polarization transfer, two‐dimensional heteronuclear single‐quantum coherence spectroscopy. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 1865–1874, 2005