Abstract
Abstract The simultaneous sorption and diffusion of acid and salt in polyvinylalcohol are considered under conditions of polymer swelling. Obtained data on water sorption by PVA show an anomalous mechanism of the transport of solvent in this kind of polymer. The analysis of equilibrium sorption of an acid-salt mixture shows that interactions of polymer OH groups with hydrogen ions of hydrogen chloride lead to a decrease in salt solubility in the polymer. The theory of Donnan equilibrium was used to solve the problem of the sorption of the acid-salt mixture as well as to create the boundary conditions for a proposed mathematical model of the transport of the buffer mixture. Methods of determining parameters of the buffer mixture transport in hydrophilic polymers have been created and physicochemical characteristics of investigated multicomponent system are calculated on the basis on these methods.
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