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Abstract
This review summarizes the preparation and physico‐chemical properties of novel polymeric betaines based on ethyl 3‐aminocrotonate and its N‐substituted alkyl derivatives that, in turn, were obtained by condensation of acetoacetic ester with various amines, aminoalcohols, and aminoacids in mild conditions. Stereochemical peculiarities and tautomeric transitions in monomers as well as kinetics and mechanism of formation of linear and crosslinked polybetaines proceeding via Michael addition reaction are outlined. Attention was paid to hydrodynamic, conformational and molecular characteristics of linear and stimuli‐sensitive properties of crosslinked systems as a function of pH, ionic strength, thermodynamic quality of solvents and electric field.
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