次磷酸铝与石墨烯对PBT的协效阻燃作用

Synergistic Effect of Aluminum Phosphate and Graphene on Flame Retardant PBT

将次磷酸铝(AHP)和石墨烯(RG(O)协效应用于聚对苯二甲酸丁二醇酯(PBT)的阻燃处理。采用极限氧指数、垂直燃烧分析、微型量热分析、热失重分析等研究了PBT复合材料的阻燃性能。结果表明,适量RGO的加入能明显改善PBT的抗滴落性能;PBT/AHP-0.5%RGO(质量分数,下同)样品的热释放速率峰值最低,从PBT/20%AHP的518.7 W/g降低到433.0 W/g,下降了约16.52%;RGO在合适的比例下可以促进PBT/AHP-0.5%RGO样品残炭外表面形成较多数量,致密的囊泡,有效地阻碍了可燃性小分子的逸出,改善了材料的阻燃性能。

Aluminum phosphate （AHP） and graphene （RGO） were used as flame retardants for poly （1,4-butylene terephthalate）（PBT）. The limited oxygen index and vertical burning tests showed that the addition of suitable amount of RGO could obviously improve the anti-dripping performance of PBT. Micro calorimeter test showed that the sample of PBT/AHP-0. 5%RGO had the lowest peak heat release rate, which decreased from 518. 7 to 433.0 W/g. A proper proportion of RGO could promote the formation of large quantity pores on the surface, which may prevent the escape of the flammable small molecules, thus to improve the flame retardant properties of the materials.