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Modeling of moisture sorption isotherms of poly(vinyl alcohol)/starch films
Author(s) -
Raj Baldev,
Eugene Raj A.,
Madan P.
Publication year - 2003
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.12589
Subject(s) - sorption , vinyl alcohol , moisture , materials science , sorption isotherm , thermodynamics , water activity , polymer chemistry , starch , water content , chemistry , adsorption , chemical engineering , composite material , organic chemistry , physics , polymer , geology , geotechnical engineering , engineering
Abstract Studies on the moisture sorption characteristics of poly(vinyl alcohol)/starch blends for water activity ( a w ) values of 0.1–0.9 were performed at 27°C. The equilibrium moisture content at different a w values was used to fit different sorption isotherm models proposed in the literature. The ranges of a w applicable for the different sorption isotherms were reported. The model constants of the sorption equations were determined by linear fitting. The value of the coefficient of determination (0.98 ± 0.01) confirmed the goodness of fit of the equations studied. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 3874–3881, 2003