凹凸棒土协同膨胀型阻燃剂阻燃聚丙烯的研究

摘要

研究了凹凸棒土(ATP)在膨胀阻燃聚丙烯(FRPP)复合材料中的协同作用,揭示了协同作用产生的机理.膨胀型阻燃剂(IFR)由聚磷酸铵和季戊四醇复配而成.探讨了ATP含量对复合材料的极限氧指数(LOI)、锥形量热参数、热稳定性能以及力学性能的影响.结果表明,当用少量ATP代替IFR时,可以提高复合材料的LOI,显著降低复合材料的热释放速率峰值和烟生成速率,提高复合材料在550℃以上高温区间的热稳定性.当复合材料中ATP质量分数在3.0％～7.0％时,复合材料的拉伸强度有提高.%Synergistic effects of attapulgite (ATP) on the intumescent flame-retardant PP (FRPP) composites were investigated,and the synergistic mechanism was revealed.The intumescent flame retardant (IFR) was composed of ammonium polyphosphate and pentaerythritol.The influence of ATP content on the limiting oxygen index (LOI),cone calorimetry parameters,thermal stability and mechanical property of the composites were studied.The results show that when a little ATP replaces IFR,the LOI of FRPP is increased,the peak values of heat release rate and smoke production rate of the composites are decreased,and thermal stability of the composites is also increased above 550 ℃.Tensile strength of the composites with 3.0％～7.0％ ATP is increased compared with that of the composites without ATP.