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Comonomer sequence determination of vinyl acetate–glycidyl methacrylate copolymers by NMR spectroscopy

✍ Scribed by A. S. Brar; Shiv Charan

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
414 KB
Volume
34
Category
Article
ISSN
0887-624X

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✦ Synopsis

SYNOPSIS

(Vinyl acetate)/(glycidyl methacrylate) (V/G) copolymers were prepared by free radical solution polymerization in benzene. Copolymer composition was determined by 'H-NMR spectroscopy. Comonomer reactivity ratios were calculated by Kelen-Tiidos (KT) and errorin-variables (EVM) methods. The values reactivity ratios calculated by these methods are rv = 0.03 -t 0.01; rG = 38.9 -t 6.20 (KT) and rv = 0.03 -t 0.002; rG = 39.5 k 1.97 (EVM). The microstructure of V/G copolymers in terms of the distribution of V and G centered was obtained from 13C{ 'H}-NMR spectra using the carbonyl carbon resonance signals of V as well as G units. 0

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