中文名称：聚己内酯-b-聚乙二醇-b-聚己内酯(x/y/x)

英文名称：PCL-b-PEG-b-PCL

分子式：H(OCH2CH2CH2CH2CH2CO)mO(CH2CH2O)n(COCH2CH2CH2CH2CH2O)mH

生物相容性、两亲性三嵌段聚合物，由亲水性、中心PEG嵌段和两个末端疏水性PCL嵌段组成。这些材料已用于药物输送应用以及热塑性弹性体。通过控制每个聚合物块的相对长度，可以制备具有不同性质的定义明确的材料。羟基端接允许对这些材料进行简单的进一步化学改性。

Biocompatible, amphiphilic triblock polymer composed of a hydrophilic, central PEG block and two terminal hydrophobic PCL blocks. These materials have been used in drug delivery applications as well as thermoplastic elastomers. Well-defined materials with varying properties can be prepared by controlling the relative length of each polymer block. Hydroxyl termination allows for facile further chemical modification of these materials.