聚二甲基硅氧烷／聚氨酯共混体系的增容作用

COMPATIBILIZATION OF PDMS/PU BLENDS

采用聚二甲基硅氧烷－ｂ－聚乙二醇嵌段共聚物（ＤＭＳ－ｂ－ＯＥ）为增容剂，增容聚二甲基硅氧烷／聚氨酯（ＰＤＭＳ／ＰＵ）共混体系，重点研究了增容剂的增容效应。结果表明，ＤＭＳ－ｂ－ＯＥ对ＰＤＭＳ／ＰＵ共混体系的增容效果与聚氨酯的化学结构有关；ＤＭＳ－ｂ－ＯＥ对聚二甲基硅氧烷／聚四氢呋喃聚氨酯（ＰＤＭＳ／ＰＵ）共混体系有良好的增容作用，使其力学性能有明显的提高。

Polydimethylsiloxane-b-poly(ethylene oxide)block polymers(DMS-b-OE)were used to improve the compatibility of polydimethylsiloxane/polyurethane(PDMS/PU)blends.It was found that the compatibilization effect of DMS-b-OE was related to the chemical structure of the blended polyurethane.DMS-b-OE can promote the compatibility of the blends of PDMS with poly (tetramethyl oxide)urethane,and the resulted blends have a good mechanical properties.