Abstract

Nano-silica was modified with triazine derivative and characterized using FTIR and TGA techniques. Then the hybrid nano-silica was blended with polypropylene and intumescent flame retardant to prepare a novel intumescent flame-retardant polypropylene. Nitrogen and phosphorus elemental mapping micrographs and SEM micrographs elucidated that the hybrid nano-silica could facilitate intumescent flame retardant to disperse more uniformly in polypropylene. TGA results showed that hybrid nano-silica could improve the thermal stability of polypropylene. With 18% intumescent flame retardant and 2% hybrid nano-silica, the novel intumescent flame-retardant polypropylene got a limiting oxygen index of 29.7% and passed the vertical burning (UL-94) V-0 rating. Cone calorimeter test showed that the peak heat release rate and total heat release clearly decreased.

中文翻译：

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三嗪衍生物改性的纳米SiO 2增强膨胀型阻燃聚丙烯的阻燃性和力学性能

摘要

用三嗪衍生物改性纳米二氧化硅，并使用FTIR和TGA技术对其进行表征。然后，将杂化纳米二氧化硅与聚丙烯和膨胀型阻燃剂共混以制备新型的膨胀型阻燃聚丙烯。氮和磷元素图显微照片和SEM显微照片表明，杂化纳米二氧化硅可以促进膨胀型阻燃剂更均匀地分散在聚丙烯中。TGA结果表明，杂化纳米二氧化硅可以提高聚丙烯的热稳定性。新型的膨胀型阻燃聚丙烯具有18％的膨胀型阻燃剂和2％的杂化纳米二氧化硅，极限氧指数为29.7％，并通过了垂直燃烧（UL-94）V-0等级。锥形量热仪测试表明，峰值放热速率和总放热明显降低。