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以膨胀型阻燃剂(IFR)作为聚丙烯(PP)的主要阻燃剂制备了IFR/PP(20/100)阻燃体系,在此基础上,将氢氧化镁(MH)和IFR进行复配,利用氧指数、力学性能测试、热重分析、锥形量热等方法考察了MH在IFR阻燃PP中的阻燃增效作用。研究结果表明:IFR/MH/PP质量比为18:2:80时,材料能够较好地保持力学性能且氧指数最大可达31.6%;IFR/MH/PP比IFR/PP体系在热释放、烟气、CO和CO_2排放指标上数值更低,热稳定性增加,成炭率更高,材料更难点燃,火灾性能指数(FPI)提高,阻燃性能优异,火灾蔓延指数(FGI)减小,火灾危险性降低。
IFR / PP (20/100) flame retardant system was prepared by using intumescent flame retardant (IFR) as the main flame retardant of polypropylene (PP). On the basis of this, magnesium hydroxide (MH) and IFR Flame retardant and synergistic effect of MH in IFR flame retardant PP were investigated by oxygen index, mechanical property test, TGA and cone calorimetry. The results show that the mechanical properties can be maintained well and the oxygen index can reach 31.6% at the IFR / MH / PP mass ratio of 18: 2: 80. IFR / MH / PP ratio of IFR / Flue gas, CO and CO 2 emissions Lower values, increased thermal stability, higher char yields, harder materials, higher fire performance index (FPI), superior flame retardance, and lower FGI , Reduce the risk of fire.