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One‐ and two‐dimensional nuclear magnetic resonance studies on the compositional sequence and the microstructure of acrylamide/acrylonitrile copolymers
Author(s) -
Mukherjee Munia,
Chatterjee S. K.,
Brar A. S.
Publication year - 1999
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/(sici)1097-4628(19990705)73:1<55::aid-app7>3.0.co;2-l
Subject(s) - acrylonitrile , copolymer , acrylamide , microstructure , materials science , sequence (biology) , nuclear magnetic resonance , polymer chemistry , polymer science , chemical engineering , composite material , polymer , chemistry , physics , engineering , biochemistry
Copolymers containing acrylamide ( A ) and acrylonitrile ( B ) units of different compositions were synthesized by free‐radical solution polymerization. The reactivity ratios were estimated by the Kelen Tudos and nonlinear error‐in‐variable methods. The triad sequence distribution in terms of A ‐ and B ‐centered triads were obtained from 13 C{ 1 H}‐NMR spectroscopy. The complete spectral assignments in terms of compositional and configurational sequences of the overlapping carbon and proton spectra of these copolymers were done using distortionless enhancement by polarization transfer (DEPT), two‐dimensional proton‐detected heteronuclear correlation (inverse‐HETCOR), and total correlated spectroscopy (TOCSY) experiments. The Monte Carlo simulation was used to study the effect of the fractional conversion on the triad fractions. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 55–67, 1999