Abstract
The structure and acid-base characteristics of the functional groups of chitozan carboxymethyl ether, a polyampholyte containing carboxyl and amine groups, are studied. As a result of the mutual effects, the strength of the ionogenic groups in this polyampholyte is higher than in chitozan and carboxymethyl cellulose, which are polyelectrolytes having a single type of functional group. Over the pH range 2–8 the transition of the carboxymethyl chitozan-water system from the homogeneous state into the heterogeneous state, and again into the homogenous state, takes place as a result of a change in the degree of ionization of the functional groups of the polymer, and because of the formation of an internal salt at the isoelectric point.
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