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Investigation of microstructure of the acrylonitrile‐styrene‐glycidyl methacrylate terpolymers by 1D and 2D NMR spectroscopy
Author(s) -
Pradhan D. R.
Publication year - 2003
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.12177
Subject(s) - acrylonitrile , comonomer , glycidyl methacrylate , two dimensional nuclear magnetic resonance spectroscopy , spectroscopy , nuclear magnetic resonance spectroscopy , styrene , materials science , heteronuclear molecule , methacrylate , analytical chemistry (journal) , polymer chemistry , polymerization , nmr spectra database , proton nmr , chemistry , copolymer , spectral line , organic chemistry , stereochemistry , polymer , physics , quantum mechanics , astronomy
Abstract Acrylonitrile‐styrene‐glycidyl methacrylate (N/S/G) terpolymers were prepared by bulk polymerization by using benzoyl peroxide as initiator and analyzed by NMR spectroscopy. The compositions of terpolymers were determined by quantitative 13 C{ 1 H}‐NMR spectra and compared with those calculated by Goldfinger's equation by using comonomer reactivity ratios: r NS = 0.04, r SN = 0.40; r NG = 0.22, r GN = 1.37; r SG = 0.44, r GS = 0.53. The 13 C{ 1 H}‐ and 1 H‐NMR spectra were overlapping and complex. The spectral assignments were done with the help of distortionless enhancement by polarization transfer and two‐dimensional 13 C‐ 1 H heteronuclear single quantum correlation experiments. 2D total correlated spectroscopy was used to ascertain the various coupling between the protons. The methyl, methine, methylene, and oxymethylene carbon resonances showed compositional sensitivity. 2D nuclear Overhauser enhancement spectroscopy (NOESY) experiment was used to ascertain the spatial proton–proton couplings. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 1779–1790, 2003