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

被引：19

作者：

Abdel-Hamid, MI ^{[1
]}

Ahmed, GAW ^{[1
]}

Hassan, RM ^{[1
]}

机构：

[1] Assiut Univ, Fac Sci, Dept Chem, Assiut 71516, Egypt

来源：

EUROPEAN POLYMER JOURNAL | 2001年 / 37卷 / 11期

关键词：

oxidation; kinetics; polyvinyl alcohol; chromic acid;

D O I：

10.1016/S0014-3057(01)00128-8

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The kinetics of chromic acid oxidation of poly(vinyl alcohol) (PVA), a synthetic 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.

引用

页码：2201 / 2206

页数：6

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