Document Details

Document Type : Article In Journal 
Document Title :
Kinetics of permanganate oxidation of synthetic macromolecule poly(vinyl alcohol)
Kinetics of permanganate oxidation of synthetic macromolecule poly(vinyl alcohol)
 
Subject : Chemistry 
Document Language : English 
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 dependences [PVA]. The second-order kinetics with respect to [H2S04] at low concentration shifts to first- order at higher concentration. Water soluble colloidal Mn02 has been identified as an intermediate in the reduction of Mn04" by PVA. The hydrogen ions decrease the stability of colloidal Mn02. Poly(vinyl ketone) is found to be the final oxidation product of PVA. Inorganic electrolytes like NaF, Na4P207 and MnCI 2 (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. 
ISSN : 0376-4710 
Journal Name : Indian Journal of Chemistry - Section A Inorganic, Physical, Theoretical and Analytical Chemistry 
Volume : 48 
Issue Number : 2 
Publishing Year : 2009 AH
2009 AD 
Number Of Pages : 5 
Article Type : Article 
Added Date : Wednesday, October 14, 2009 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
Malik, M.AMalik, M.AResearcherDoctorate 
Ilyas, MIlyas, MResearcherDoctorate 
ظهير خانKhan, Z.HResearcherDoctoratedrkhanchem@yahoo.com

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