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Swelling effect of semicrystalline poly(vinyl alcohol) in hydrogen peroxide

✍ Scribed by Ping I. Lee

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
519 KB
Volume
42
Category
Article
ISSN
0021-8995

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✦ Synopsis

The effect of hydrogen peroxide on the physicochemical properties of semicrystalline poly ( vinyl alcohol) ( PVA ) has been investigated. Significant and irreversible increases in equilibrium water swelling, dissolved oxygen permeability, and surface wettability have been observed in PVA samples treated with concentrated hydrogen peroxide. Based on the small amount of carbonyl content detected and the crystallinity reduction in hydrogenperoxide-treated poly (vinyl alcohol) samples, a mechanism involving a combination of hydrogen-peroxide-induced oxidative chain scission and dissolution of crystalline regions in poly (vinyl alcohol) is proposed for the observed swelling kinetics and associated changes in polymer properties.

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