Kinetics and mechanism of oxidation of poly(vinyl alcohol) macromolecule by chromic acid in aqueous perchloric acid

Authors
Abdel-Hamid, MI Ahmed, GAW Hassan, RM
Citation
Mi. Abdel-hamid et al., Kinetics and mechanism of oxidation of poly(vinyl alcohol) macromolecule by chromic acid in aqueous perchloric acid, EUR POLYM J, 37(11), 2001, pp. 2201-2206
Citations number
17
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
EUROPEAN POLYMER JOURNAL
ISSN journal
00143057 → ACNP
Volume
37
Issue
11
Year of publication
2001
Pages
2201 - 2206
Database
ISI
SICI code
0014-3057(200111)37:11<2201:KAMOOO>2.0.ZU;2-0
Abstract
The kinetics of chromic acid oxidation of poly(vinyl alcohol) (PVA), a synt hetic polymer, in perchlorate media at a constant ionic strength of 1.0 mol dm(-3) has been studied spectrophotometrically. A first-order reaction in chromic acid and a fractional order with respect to PVA concentration were observed. The reaction was found to be acid catalyzed. Kinetic evidence for the formation of an intermediate complex between the chromic acid and PVA is presented. A mechanism consistent with the kinetic results is suggested. (C) 2001 Elsevier Science Ltd. All rights reserved.