中文名称：聚乙二醇-b-聚左旋丙交酯(x/y)

英文名称：mPEG-b-PLLA

由亲水性PEG嵌段和疏水性聚（D，L-丙交酯）（PLA）嵌段组成的具有生物相容性的两亲性嵌段共聚物。这些材料已被用于药物封装和递送应用的控制释放和纳米颗粒配方。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 block copolymer composed of a hydrophilic PEG block and a hydrophobic poly(D,L-lactide) (PLA) block. These materials have been used in control release and nanoparticle formulation for drug encapsulation and delivery applications. 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.