Structure of highly elastic and high water-content hydrogels obtained from poly(vinyl alcohol)/poly(allyl amine)/water system.

1 January 1992

journal article
Published by Society of Fiber Science and Technology Japan in Sen'i Gakkaishi

Vol. 48 (3) , 127-132
https://doi.org/10.2115/fiber.48.3_127

Abstract

Highly elastic and high water-content hydrogels were prepared by coagulation of concentrated aqueous solutions of poly (vinyl alcohol) (PVA) and poly (allyl amine) (PAlAm) blends in an autoclave at 2 atm and at 120°C, followed by dehydration in methanol and re-swelling in water. The elastic moduli of the hydrogels increased with increasing PAlAm content and were higher than those of the PVA hydrogels obtained by repeated freezing and thawing. This was explained based on the presence of rigid phase due to the formation of polymer complex between PVA and PAlAm. The water enclosed in the network had lower mobility than the free water.

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