Thermosensitive biodegradable copolymer

摘要

A thermo-sensitve copolymer of following formula; is disclosed; wherein R₁ is hydrogen, or -C(-O)-R₂; R₂ is C_7-30 alkyl substituted or unsubstituted with functional groups; R₃ is hydrogen, or C_1-6 alkyl; and x, y or z individually is an integer greater than 0. The thermo-sensitive copolymers disclosed here are easy to be implanted into a human body through injection. The biodegradability is greatly improved and the cytotoxicity of the copolymers is low.