A biodegradable block copolymer is disclosed, comprising a hydrophilic block derived from a polyether alcohol; and a hydrophobic block comprising a first repeat unit derived by ring opening polymerization of a first cyclic carbonyl monomer initiated by the polyether alcohol, the first repeat unit comprising a side chain moiety comprising a functional group selected from the group consisting of urea groups, a carboxylic acid groups, and mixtures thereof. No side chain of the hydrophobic block comprises a covalently bound biologically active material. The block copolymer self-assembles in water forming micelles suitable for sequestering a biologically active material by a non-covalent interaction, and the block copolymer is 60% biodegraded within 180 days in accordance with ASTM D6400.
一种可
生物降解的嵌段共聚物被披露,包括源自
聚醚醇的亲
水性块;和包括由
聚醚醇引发的第一环状羰基单体的环开聚合得到的疏
水性块,该第一重复单元包括一个侧链基团,该侧链基团包括从
尿素基团、
羧酸基团或它们的混合物中选择的功能基团。疏
水性块的任何侧链均不包括共价结合的
生物活性物质。该嵌段共聚物在
水中自组装形成适合通过非共价相互作用固定
生物活性物质的胶束,并且根据ASTM D6400标准,该嵌段共聚物在180天内
生物降解60%。