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Water vapor sorption by amylose and cellulose acetates
Author(s) -
Barnes H. M.,
Skaar C.,
Luner P.
Publication year - 1977
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.1977.070210422
Subject(s) - sorption , amylose , vapor pressure , cellulose , water vapor , chemistry , polymer , annealing (glass) , cellulose acetate , thermodynamics , polymer chemistry , materials science , organic chemistry , chemical engineering , adsorption , starch , physics , engineering
Experimental sorption isotherms for amylose acetate (ADA) and cellulose acetate (CDA) are discussed in terms of the B.E.T. theory and the Hailwood–Horrobin theory. The B.E.T. theory predicted a good fit to most of the experimental isotherms up to 0.8 relative vapor pressure. A somewhat better fit was found with the solution theory of Hailwood–Horrobin over the entire range of relative vapor pressures. Annealing had little effect on the sorption properties of CDA, but significantly reduced sorption in ADA. This was attributed to a higher degree of ordering in the amylose polymer.