Abstract
The properties of aqueous acetic-acid solutions of chitosan and copolyacrylmethacrylate Eudragit E, which contains tertiary amines, were studied. It was shown that monophasic solutions in a common solvent in a certain pH range that enabled the degree of protonation of the amines and the conditions for chemical cross-linking of chitosan to be controlled could be prepared by using amine-containing polymers with different types of amines. IR spectroscopy of films formed from solutions of combined chitosan and Eudragit E showed that the functional groups of the studied amine-containing polymers did not interact. The ability to change the degree of swelling and the solubility of the films by adding a bifunctional reagent that reacted only with primary amines was demonstrated.
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