Effects of the pH, concentration, and solvents on the ultrasonic degradation of poly(vinyl alcohol)

被引：34

作者：

Vijayalakshmi, SP ^{[1
]}

Madras, G ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Chem Engn, Bangalore 560012, Karnataka, India

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2006年 / 100卷 / 06期

关键词：

degradation; water-soluble polymers; molecular weight distributions; ultrasound;

D O I：

10.1002/app.23280

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 ultrasonic degradation of poly(vinyl alcohol) was investigated at different pHs of the solvent, in different water/solvent binary mixtures, and at different polymer concentrations. The samples were analyzed with gel permeation chromatography. The degradation rate coefficients were determined with a continuous distribution model. A higher degradation rate was obtained at pH extremes, in better solvents, and at lower polymer concentrations. The results are explained and discussed. (c) 2006 Wiley Periodicals, Inc.

引用

页码：4888 / 4892

页数：5

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