The miscibility of three kinds different soft segments (polycaprolactone, polypropylene oxide, polytetramethylene oxide) polyurethanes possessing the same hard segmental structure and content with PVC or CPVC blends were studied by DSC.

• 采用示差扫描量热法研究了相同硬段及含量的3种不同类型软段的聚氨酯与聚氯乙烯（PVC）、氯化聚氯乙烯（CPVC）的相容性。