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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/1171

Title: Complete spectral assignments of methacrylonitrile–styrene–methyl methacrylate terpolymers by 2D NMR spectroscopy
Authors: Brar, A S
Pradhan, D R
Keywords: Sequence distribution
Two-dimensional NMR
Methacrylonitrile–styrene–methyl methacrylate terpolymer
Multicomponent
Issue Date: 2003
Citation: Journal of Molecular Structure, 649, 245–255
Abstract: Methacrylonitrile–styrene–methyl methacrylate (N/S/M) terpolymers of different monomer concentrations were prepared by bulk polymerization. The terpolymer compositions were determined by quantitative 13C{1H} NMR spectra and compared with those calculated by Goldfinger’s equation using comonomer reactivity ratios: rNS ¼ =0.30, rSN ¼= 0.45; rNM ¼= 0.91,rMN ¼ =0.88; rSM ¼= 0.52, rMS ¼= 0.47. The overlapping and complex 13C{1H} and 1H NMR spectra of the terpolymers were assigned with the help of distortionless enhancement by polarization transfer and two-dimensional (2D) 13C–1H heteronuclear single quantum coherence experiments. The various vicinal and geminal couplings between the protons in the polymer chains can be seen in the 2D total correlated spectroscopy experiments.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/1171
Appears in Collections:Chemistry

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