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The use of volume‐averaging techniques to predict temperature transients due to water vapor sorption in hygroscopic porous polymer materials
Author(s) -
Gibson Phillip,
Charmchi Majid
Publication year - 1997
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/(sici)1097-4628(19970418)64:3<493::aid-app6>3.0.co;2-f
Subject(s) - sorption , materials science , porous medium , water vapor , thermodynamics , mass transfer , porosity , work (physics) , volume (thermodynamics) , polymer , diffusion , composite material , chemistry , organic chemistry , physics , adsorption
Abstract Volume‐averaging techniques developed for modeling drying processes in porous materials offer a convenient framework for analyzing vapor sorption in porous hygroscopic polymeric materials. Because of the large temperature changes associated with water vapor sorption in these materials (from 10° to 20°C), sorption/diffusion processes are best characterized through the coupled differential equations describing both the transport of energy and mass through the porous structure. Experimental and numerical results are compared for a variety of natural and man‐made porous polymeric materials (textiles) using the volume‐averaging technique. Boundary heat and mass transfer coefficients and assumptions about thermal radiative properties of the experimental apparatus are shown to influence results obtained with the numerical solution method. © 1997 John Wiley & Sons, Inc. This article is a US Government work and, as such, is in the public domain in the United States of America. J Appl Polym Sci 64: 493–505, 1997