多嵌段聚氨酯与PVC及CPVC共混体系相容性的研究

STUDIES ON MISCIBILITY OF SEGMENTED POLYURETHANE WITH CHLORIZATED POLYVINYL CHLORIDE OR POLYVINYL CHLORIDE BLENDS

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。结果表明，多嵌段聚氨酯与ＰＶＣ、ＣＰＶＣ的相容性次序为：ＰＣＬ－ＰＵＰＴＭＯ－ＰＵ＞ＰＰＯ－ＰＵ。

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. The experimental results indicated that the segmented polyurethanes with PVC or CPVC blends have as the following compatibility order: PCL PUPTMO PU>PPO PU. The results also showed that the PVC has similar miscible behavior to the CPVC in the blends.