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13 C NMR spectral assignments of methacrylic acid/acrylonitrile statistical copolymers
Author(s) -
Borbely Janos D.,
Hill David J. T.,
Lang Anthony P.,
O'Donnell James H.
Publication year - 1991
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990260309
Subject(s) - diad , copolymer , acrylonitrile , triad (sociology) , methacrylic acid , polymer chemistry , dept , tacticity , materials science , polymer , carbon 13 nmr , nmr spectra database , proton nmr , racemization , spectral line , polymer science , chemistry , organic chemistry , stereochemistry , physics , polymerization , psychology , astronomy , psychoanalysis , composite material
Copolymerization of methacrylic acid (M) and acrylonitrile (A) in bulk at 60°C gives a statistical copolymer. Through the use of 1 H, 13 C, DEPT and twodimensional NMR techniques, the observed resonances in the NMR spectra of these copolymers can be assigned, and thus provide detailed information about the microstructure of the polymer at the diad, triad and tetrad levels. Configurational effects have also been shown to play an important role, although in all cases the chemical shift differences resulting from configurational variation are smaller than those resulting from sequence variation.