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Effects of the pH, concentration, and solvents on the ultrasonic degradation of poly(vinyl alcohol)
Author(s) -
Vijayalakshmi S. P.,
Madras Giridhar
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23280
Subject(s) - vinyl alcohol , solvent , degradation (telecommunications) , gel permeation chromatography , polymer , polymer degradation , materials science , polymer chemistry , alcohol , chemical engineering , chemistry , organic chemistry , composite material , telecommunications , computer science , engineering
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. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 4888–4892, 2006