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采用熔融共混法制备了聚丙烯/三聚氰胺聚磷酸盐/磷酸三苯酯(PP/MPOP/TPP)和聚丙烯/三聚氰胺聚磷酸盐/磷酸三苯酯/季戊四醇(PP/MPOP/TPP/PER)复合材料,研究了不同阻燃组分配比对PP燃烧行为的影响。结果表明:当MPOP/TPP复合阻燃剂的添加量为30份、MPOP与TPP的质量比为20/10时,PP/MPOP/TPP复合材料的热稳定性下降,但其阻燃性能有一定程度的提高。在该体系中添加7.5份PER,当复合阻燃剂FR(MPOP/TPP=20/10)与PER的配比为22.5/7.5时,材料的热稳定性下降,但成炭效果增加,极限氧指数(LOI)达到22.6%,较纯PP提高了26.97%;同时材料的热释放速率、总释热量、有效燃烧热和有害气体的产率均明显减小,PP/MPOP/TPP/PER阻燃复合材料的阻燃性能显著提高。
Polypropylene / melamine polyphosphate / triphenyl phosphate (PP / MPOP / TPP) and polypropylene / melamine polyphosphate / triphenyl phosphate / pentaerythritol (PP / MPOP / TPP / PER) were prepared by melt blending method. Composites, the effects of different flame retardant components on the combustion behavior of PP were studied. The results show that the thermal stability of PP / MPOP / TPP composites decreases when the mass fraction of MPOP / TPP composite flame retardant is 30 parts and the mass ratio of MPOP to TPP is 20/10, but the flame retardant properties are certain The degree of improvement. When 7.5 parts of PER was added into the system, the thermal stability of the material was decreased when the ratio of FR (MPOP / TPP = 20/10) to PER was 22.5 / 7.5, but the charring effect increased. The limiting oxygen The index (LOI) reached 22.6%, which was 26.97% higher than that of pure PP. Meanwhile, the heat release rate, total heat release, effective combustion heat and the yield of harmful gases were significantly reduced. PP / MPOP / TPP / The flame retardant properties of composite materials significantly increased.