中文摘要：

以端羟基L-丙交酯/乙交酯共聚物(PLLG-diol)和端羟基ε-己内酯/乙交酯共聚物(PCG-diol)为硬段和软段,通过与二异氰酸酯反应制得了软、硬分子量和组成均可调的多嵌段聚(酯-氨酯),表征了它们的形状记忆行为.多嵌段聚(酯-氨酯)具有良好的形状记忆性质,应变固定率达98%~99.5%,应变恢复率达93%~98.5%;通过转变温度的调节,可使多嵌段聚(酯-氨酯)在37℃体温下不发生形状变化,而在稍高于体温的温度(40~50℃)下恢复原始形状,其形状恢复速率可通过温度和升温速率来调节.

英文摘要：

It is very important to manipulate the switch temperature,mechanical properties and degradation rate of biodegradable shape memory polymers(BSMPs) from the viewpoint of practical applications.This can be realized through molecular design of the microstructure of the building blocks of BSMPs.In this study,hydroxy-telechelic(poly(L-lactide-co-glycolide))(PLLG-diol) and (poly(ε-caprolactone-co-glycolide))(PCG-diol) copolymers with adjustable composition,molecular weight and thermal transition temperature were ...