✦ LIBER ✦

Determination by 13C-NMR spectroscopy of the microstructure of copolymers of acrylic acid with vinyl acetate

✍ Scribed by A.S. Brar; Sunita

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 312 KB
Volume: 27
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(91)90119-9

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✦ Synopsis

Acrylic acid-vinyl acetate copolymers were prepared in bulk using benzoyl peroxide as initiator.

Copolymer compositions were determined by volumetric titration; monomer reactivity ratios were determined by the method of Kelen-Tiidrs. Terminal and penultimate reactivity ratios have been calculated using the observed monomer triad sequence distribution determined from ~3C-NMR spectroscopy. Triad sequence distribution was used to calculate dyad concentrations, probability parameters, number-average sequence lengths and comonomer mol fractions in the copolymers. The observed triad sequence concentrations as determined from ~3C-NMR agreed well with those calculated from reactivity ratios.

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