METHOD OF MODIFYING BIODEGRADABLE POLYMERS Russian patent published in 2011 - IPC C08G63/91 C08G63/02 C08K5/14 C08J5/18 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of modifying a biodegradable polymer or copolymer. Described is a method of modifying a polymer or copolymer, having the structure of one or more repeating units (1), where n is an integer, m is an integer between 0 and 6, and R is selected from hydrogen, substituted or unsubstituted C₁-C₂₀ alkyl, C₃-C₂₀ cycloalkyl, C₆-C₂₀ aryl, C₇-C₂₀ aralkyl and C₇-C₂₀ alkaryl, where said groups may include straight or branched alkyl fragments; optionally one or more substitutes are selected from a group comprising hydroxyl groups, alkoxy groups, straight or branched alk(en)yl, aryloxy, halogen, carboxylic acid, ester, carboxy, nitrile and amido, involving bringing the polymer or copolymer into contact with a cyclic organic peroxide under conditions where at least a certain amount of the said peroxide decomposes. The invention also describes a modified polymer or copolymer obtained using said method.

EFFECT: obtaining a (co)polymer characterised by high degree of branching without formation of gel.

7 cl, 4 ex, 8 tbl, 3 dwg