Crosslink nature in Cr(III)-polyacrylamide gels

Maria Vamvakaki, Edna N. Yamasaki, Stella C. Hadjiyannakou, Costas S. Patrickios

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The equilibrium constants of various candidates for the crosslinking reaction between chromium(III) and partly hydrolysed polyacrylamide have been calculated. For this purpose use has been made of a) the crosslinking index in gels to calculate the concentration of crosslinks, b) pH-dependent concentrations of various hydrolysis products of Cr3+ ions and c) pH-dependent concentration of free carboxylic acid anions. The conclusion is that the crosslinks consist of two carboxylic acid anions coordinated with the dimerisation product of the Cr3+ ions.

Original languageEnglish
Pages (from-to)189-200
Number of pages12
JournalMacromolecular Symposia
Volume171
DOIs
Publication statusPublished - 2001

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