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Process of absorption of a liquid by a thin sheet of polymer by considering diffusion and change in dimension

โœ Scribed by A. Bakhouya; A. El Brouzi; J. Bouzon; J.M. Vergnaud

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
491 KB
Volume
28
Category
Article
ISSN
0014-3057

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โœฆ Synopsis

When a polymer is in contact with a liquid, the liquid may enter the polymer, the process being controlled by transient diffusion, with subsequent swelling. A mathematical treatment cannot be made under these conditions, and a numerical treatment must be used. Generally, a framework of reference with constant dimensions is considered. A numerical model based on a method with finite difference takes into account all the facts, not only the transient diffusion with constant or concentration-dependent diffusivity but also the change in dimensions. The kinetics of absorption are obtained, as well as the profiles of concentration within the sheet.

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