新型磷氮阻燃剂对尼龙6的阻燃作用

Flame Retardancy of New Phosphorus-nitrogen Flame Retardant on PA6

研究了一种基于烷基次磷酸铝的新型磷氮阻燃剂(OP)对尼龙6(PA6)的阻燃作用。试验结果表明:该阻燃剂对PA6具有良好的阻燃作用,当其添加质量分数为25%时,PA6的氧指数(LOI)大于30%,阻燃级别达到FV-0级,燃烧时材料的热释放速率、质量损失速率和总热释放量明显降低。热重分析结果表明:OP改变了PA6的热降解过程,使之成炭化学反应提前,形成的炭层通过隔热和隔氧而产生阻燃作用。添加OP对材料的机械性能有些影响,如弯曲强度和弯曲模量有所增加,而拉伸强度和冲击功有所下降,但影响不大。

Flame retardaney of new phosphorus-nitrogen flame retardant （OP） based on aluminum dial- kylphosphinate for nylon 6 was for nylon 6. When the loading studied. The results showed that the flame retardant had good flame retardancy of OP was 25 wt% , the LOI of the nylon 6/OP composite was more than 30 and the flame retarding class meet FV-0. Compared with nylon 6, the heat release rate, mass loss rate and total heat release of the composite burned were decreased obviously. Thermogravimetric analysis results showed that the OP changed the thermal degradation of nylon 6 and produced charring reaction in advance The char layer formed brought flame retardancy by insulating heat and oxygen. The addition of OP has a little effect on the mechanical property of nylon 6 where bending strength and modulus increased, while the tensile strength and impact energy decreased.