NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.48A [2009] >
IJC-A Vol.48A(02) [February 2009] >

Title: Kinetics of permanganate oxidation of synthetic macromolecule poly(vinyl alcohol)
Authors: Malik, Maqsood Ahmad
Ilyas, Mohammad
Khan, Zaheer
Keywords: Kinetics
Reaction mechanisms
Poly(vinyl alcohol)
Permanganate oxidations
Issue Date: Feb-2009
Publisher: CSIR
IPC CodeInt. Cl. ⁸ C07B33/00
Abstract: Oxidation of poly(vinyl alcohol) (PVA) by permanganate has been studied spectrophotometrically at 525 and 420nm. Under pseudo-first order conditions ([PVA] >> [MnO₄⁻]), the reaction rate increases with [PVA] and the kinetics reveals complex order dependence on [PVA]. The second-order kinetics with respect to [H₂SO₄] at low concentration shifts to first-order at higher concentration. Water soluble colloidal MnO₂ has been identified as an intermediate in the reduction of MnO4- by PVA. The hydrogen ions decrease the stability of colloidal MnO₂. Poly(vinyl ketone) is found to be the final oxidation product of PVA. Inorganic electrolytes like NaF, Na₄P₂O₇ and MnCl₂ (a product of the reaction), have inhibitory and composite effects (inhibition and catalysis) on the reaction rate. Arrhenius and Eyring equations have been used to evaluate the activation parameters. The observed results are discussed in terms of Michaelis-Menten kinetic model. A mechanism has been proposed on the basis of experimental findings.
Page(s): 189-193
ISSN: 0376-4710
Source:IJC-A Vol.48A(02) [February 2009]

Files in This Item:

File Description SizeFormat
IJCA 48A(2) 189-193.pdf184.4 kBAdobe PDFView/Open
 Current Page Visits: 156 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 168951 since 01-Sep-2015  Last updated on 29-Jun-2016Webmaster: