As far as the same composition was concerned, PLA-PEG2000 multiblock copolymers films had better properties of water absorption and degradation than PLA-PEG1000 multiblock copolymers films.

• 同组分比例的PEG2000-PLA多嵌段共聚物的吸水性及降解性均比PEG1000-PLA多嵌段共聚物强。