The transition of polymers into a network of polymers alters per se the water activity.

Abstract:

:We have found that polyacrylamide gels cross-linked with bisacrylamide induce a larger macromolecular osmotic pressure than the non cross-linked gels. This means also that in the cross-linked gels hydration water is held more tightly to the polymer, i.e., more work is needed to remove water, than in the non cross-linked gel. Since the chemical nature of the two gels is extremely similar, we propose that the formation of the network alters per se the water activity.

journal_name

Int J Biol Macromol

authors

Trombetta G,Di Bona C,Grazi E

doi

10.1016/j.ijbiomac.2004.11.002

keywords:

subject

Has Abstract

pub_date

2005-03-01 00:00:00

pages

15-8

issue

1-2

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(04)00091-1

journal_volume

35

pub_type

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