Issue 11, 2000

A comparative and systematic thermodynamic study of aqueous solutions and hydrogels of homo- and copolymers of poly(vinyl alcohol)

Abstract

Accurate measurements of the thermodynamic activity of the solvent were performed on aqueous solutions and chemically cross-linked hydrogels of poly(vinyl alcohol) and its statistical poly(vinyl alcohol, vinyl acetate) co-polymers in the range of moderate polymer concentrations. A test of the theories has revealed that only a certain type of two-membered equation for the network part of the solvent chemical potential was appropriate to get reasonable values for the Flory–Huggins interaction parameter as a function of both the degree of cross-linking and polymer volume fraction. The strong effect of the network structure on the χ parameter as well as the gradual transition in the thermodynamic properties of the systems is discussed in detail.

Supplementary files

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Article information

Article type
Paper
Submitted
07 Feb 2000
Accepted
30 Mar 2000
First published
16 May 2000

Phys. Chem. Chem. Phys., 2000,2, 2613-2622

A comparative and systematic thermodynamic study of aqueous solutions and hydrogels of homo- and copolymers of poly(vinyl alcohol)

M. Nagy, Phys. Chem. Chem. Phys., 2000, 2, 2613 DOI: 10.1039/B001017K

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