TY - JOUR
T1 - Crosslink nature in Cr(III)-polyacrylamide gels
AU - Vamvakaki, Maria
AU - Yamasaki, Edna N.
AU - Hadjiyannakou, Stella C.
AU - Patrickios, Costas S.
PY - 2001
Y1 - 2001
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0034883673&partnerID=8YFLogxK
U2 - 10.1002/1521-3900(200106)171:1<189::AID-MASY189>3.0.CO;2-2
DO - 10.1002/1521-3900(200106)171:1<189::AID-MASY189>3.0.CO;2-2
M3 - Article
AN - SCOPUS:0034883673
SN - 1022-1360
VL - 171
SP - 189
EP - 200
JO - Macromolecular Symposia
JF - Macromolecular Symposia
ER -