KINETICS OF COORDINATION NETWORKS IN THE SODIUM CARBOXYMETHYL CELLULOSE-CR3+ SALT SYSTEM

Authors
MEDVEDEVA VV MYASNIKOVA LI SEMCHIKOV YD ROGOVINA LZ
Citation
Vv. Medvedeva et al., KINETICS OF COORDINATION NETWORKS IN THE SODIUM CARBOXYMETHYL CELLULOSE-CR3+ SALT SYSTEM, Vysokomolekularnye soedinenia. Seria A, 40(3), 1998, pp. 492-497
Citations number
8
Categorie Soggetti
Polymer Sciences
Journal title
Vysokomolekularnye soedinenia. Seria A → ACNP
ISSN journal
05075475
Volume
40
Issue
3
Year of publication
1998
Pages
492 - 497
Database
ISI
SICI code
0507-5475(1998)40:3<492:KOCNIT>2.0.ZU;2-4
Abstract
The gelation in the sodium carboxymethyl cellullose-Cr3+ salt system w as studied. The critical concentrations of gelation were determined. T he isothermal phase diagrams reflecting the time evolution of syneresi s in gels were constructed. The time dependence of elasticity moduli o f the gels was measured. The kinetic study showed that the elastic mod ulus is proportional to the Cr3+ concentration. The cross-linking in t his system was shown to be of the first order with respect to Cr3+. Th e efficient rate constant of polymer-ion binding k was found to be 0.0 25 h(-1).