Abstract

Abstract Swellability of cast films of an acrylate-methacrylate copolymer in aqueous solutions of certain permeants has been determined by fluid uptake experiments. Swellability increased linearly with urea concentrations but decreased with concentrations of ionic permeants, sodium chloride and sulfacetamide sodium. Film permeability coefficients for urea also increased linearly with its concentration whereas those for the ionic permeants increased with increase in their concentrations up to 5%, but decreased at concentrations 5% to 10% w/v. This finding can be associated with the swellability behavior of the films.

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