Both AB and ABA types block copolymers of PSt-PEO were characterized by NME, IK, UV, DSC and their bulk properties investigated by X-ray dif-fraction polarization microscopy and DSC.

• 通过含一个端羟基的AB嵌段共聚物与偶联剂甲苯二异氰酸酯反应制得ABA型嵌段共聚物。 二种共聚物均经纯化,并用NMR、IR、UV、DSC、偏光显微镜及X-射线衍射法表征,且与均聚物的混合物比较。