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以阻燃齐聚物(PSPTR)和酚醛树脂(PF)作为膨胀型阻燃剂(IFR)阻燃丙烯晴-丁二烯-苯乙烯共聚物(ABS),通过极限氧指数(LOI)和水平垂直燃烧(UL-94)测试研究了阻燃PSPTR-PF/ABS体系的阻燃性能。研究表明,当PSPTR∶PF=1∶1(质量比),总质量分数为30%时,体系的LOI为28.2%,UL-94达V-1级别。采用热重-红外联用(TG-IR)技术探索了阻燃体系的热性能和热分解历程,发现PSPTR-PF阻燃剂的加入延缓了ABS的热分解,提高了ABS的热稳定性能。采用SEM、XRD和Raman光谱分析了燃烧炭层的形貌和结构。结果表明,PF不仅改善了炭层的致密度,而且完善了炭层的石墨结构,最终提高了ABS的阻燃性能。
Flame retardant acrylonitrile-butadiene-styrene copolymer (ABS) was flame-retardant oligomer (PSPTR) and phenolic resin (PF) as intumescent flame retardant (IFR) The vertical burning (UL-94) test investigated the flame retardancy of the flame retardant PSPTR-PF / ABS system. The results showed that the system had LOI of 28.2% and UL-94 of V-1 when PSPTR: PF = 1: 1 (mass ratio) and the total mass fraction was 30%. The thermal and thermal decomposition processes of the flame retardant system were explored by TG-IR. It was found that the addition of the PSPTR-PF retardant retarded the thermal decomposition of the ABS and improved the thermal stability of the ABS. The morphology and structure of the combustion carbon layer were analyzed by SEM, XRD and Raman spectroscopy. The results show that PF not only improves the density of the carbon layer, but also improves the graphite structure of the carbon layer and finally improves the flame retardancy of the ABS.