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Structural investigation of the saponified products of acrylonitrile terpolymer by PMR and CMR spectroscopy

✍ Scribed by Manjeet Bhatia; P. Bajaj; R.B. Chavan

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 323 KB
Volume: 23
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(87)90103-0

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✦ Synopsis

~H-NMR and t3C-NMR have been employed to characterize acrylonitrile terpolymer and its saponification products. The tacticity and number-average sequence lengths of like (rio), meso(rim) and racemic (rir) acrylonitrile triad units in the products have been calculated using 13C-NMR spectra of polymer solutions at a field strength of 24.99 MHz. The spectra reveal that, with increase in saponification, the ratio of isotactic to syndiotactic nitrile triads decreases. The distribution of acrylonitrile sequences in the terpolymer and its saponified products is found to be random (ri m -tit ~ 2.0). Such determinations for acrylamide or acrylic acid units in the saponified products were not possible.

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