Branched dextran-graft-polyacrylamide copolymers (D-g-PAAn) with different number of PAA-grafts have been synthesized for further conversion them to polyelectrolytes dextran-graft-(polyacrylamide-co-polyacrylic acid). It is shown that D-g-PAAn internal structure in water solution is more compact in comparison with linear polyacrylamide and depends upon the distance between PAA grafts. The branched polyelectrolytes are obtained by alkaline hydrolysis of synthesized D-g-PAAn samples. The conversion of nonionic polymers to partial anionic form depends upon the macromolecular internal structure of D-g-PAAn. The degree of transformation of amide groups to carboxylate ones is higher for branched copolymers than for linear PAA at the same condition. The synthesized branched copolymers are shown to be perspective as flocculation agents and the matrices for synthesis of the stable Ag nanosystems.

Summary Star‐like dextran‐graft‐(polyacrylamide‐co‐polyacrylic acid) (D‐g‐(PAA‐co‐PAAc) copolymers in a salt form were obtained by alkaline hydrolysis of Dextran‐graft‐Polyacrylamide (D‐g‐PAA) samples. The internal structure of D‐g‐PAA in solution predetermined the reaction course and the conversion degree depended upon the initial architecture of macromolecules. It was shown that macromolecules of D‐g‐(PAA‐co‐PAAc) acquired extended conformation because grafted chains became greatly straightened when charged functional groups appeared. No polyelectrolyte effect for synthesized D‐g‐(PAA‐co‐PAAc) samples was registered. Star‐like polyelectrolytes were proved to be more efficient matrices in comparison with linear anionic Polyacrylamide for silver nanoparticle in situ synthesis.

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The review is devoted to the synthesis and properties of branched polymer structures of a controlled molecular architecture. The work considers the main methods to obtain branched macromolecules. The results of both theoretical calculations and experimental studies of the structure and features of the behavior of the mentioned systems in solution are analyzed and generalized. The promising use of branched polymer systems as an alternative to linear systems is noted.

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