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以Cr2O3为阻燃协效剂,采用多聚磷酸蜜胺(MPP)和笼状季戊四醇磷酸酯(PEPA)复配阻燃剂,制备了具有良好阻燃性能的无卤阻燃PP。研究了Cr2O3添加量对PP阻燃性能和协效作用的影响。结果表明:添加少量的Cr2O3可显著提高PP的阻燃性能。当MPP/PEPA/Cr2O3添加量分别为12%、8%和2%时,阻燃PP的氧指数高达31.5%。TGA、FTIR和F lynn-W all法热降解活化能分析结果表明:添加Cr2O3可以起催化MPP/PEPA酯化,促进成炭的作用,使PP的活化能提高。
A novel flame retardant PP with good flame retardancy was prepared by flame retardant synergistic effect of Cr2O3 and MPP and PEPA. The effects of Cr2O3 addition on flame retardancy and co-effect of PP were studied. The results show that adding a small amount of Cr2O3 can significantly improve the flame retardancy of PP. When MPP / PEPA / Cr2O3 were added at 12%, 8% and 2% respectively, the oxygen index of flame retardant PP was as high as 31.5%. The results of TGA, FTIR and F lynn-W all analysis showed that the addition of Cr2O3 can catalyze the esterification of MPP / PEPA and promote the formation of char and the activation energy of PP increased.