新型阻燃技术在聚丙烯中的应用

Novel Flame Retardant Technology in Polypropylene Production

将一种膨胀阻燃促进剂ＺＥＯ加入ＡＰＰ（聚磷酸铵）／ＰＥＲ（季戊四醇）膨胀阻燃剂中，用于阻燃ＰＰ（聚丙烯）。这种新型阻燃技术大幅度提高了ＡＰＰ／ＰＥＲ阻燃ＰＰ的效果，极限氧指数（ＬＯＩ）由２７５上升到４２０；垂直燃烧试验（ＵＬ９４）达到Ｖ０级；锥形量热仪（Ｃｏｎｅｃａｌｏｒｉｍｅｔｅｒ）给出的热释放和烟释放等参数也显著下降。本文还采用热重分析仪（ＴＧＡ）、自制热膨胀绝缘测量仪（ＴＦＩＴ）等手段研究了ＺＥＯ促进阻燃效果的机理。

ZEO,an expansion flame retardant promoter, was added to a mixture of APP(ammonium polyphosphate)and PER(pentaerythritol),to be used for the preparation of expansion flame retardant PP(polypropylene).The result showed that the flame retardance of APP/PER was greatly improved.The limiting oxygen index(LOI)of the flame retardant PP with APP/PER additives increased from 27 5(with no ZEO added) to 49 0(with ZEO added).It was being graded as class V 0 in UL94 tests.Significant reduction in the releasing rate of heat and smoke was also noted,as measured by the Cone calorimeter measuring device.The mechanism of ZEO serving as a flame retardant promoter was also examined with the employment of the TGA meter and a thermal foaming insulation tester(TFIT).The TFIT was designed and built in our laboratory.