聚磷酸酯阻燃剂对PC/ABS合金阻燃性能影响

以聚苯氧基磷酸-2-10-氢-9-氧杂-磷杂菲基对苯二酚酯(POPP)为阻燃剂,对PC/ABS合金进行阻燃改性。通过极限氧指数(LOI)测试、垂直燃烧(UL-94)测试、热重分析(TGA)测试、锥形量热(CONE)测试和扫描电镜(SEM)测试等表征方法研究其阻燃性能。结果表明,当阻燃剂添加量为15%时可以达到UL94 V-0级,LOI值为21.1%;最大热释放速率(Pk-HRR)下降41.7%,热释放总量(THR)下降31.1%;TGA和SEM分析显示改性PC/ABS合金具有更好的成炭效果,燃烧后能促进表面生成致密多孔炭层,有效的隔绝氧气提高材料的阻燃性能。

Influence of polyphosphate flame retardant on PC/ABS alloy

A novel flame retardant,poly (2-10-hydrogen-9-oxa-phosphaphenanthrene hydroquinone phenyl phosphate)(POPP),was incorporated to PC/ABS to improve the flame retardancy of PC/ABS. Flame retardant properties of PC/ABS were investigated by limited oxygen index test,vertical combustion test,thermal gravimetric analysis test,cone calorimetric test and scanning electron microscopy test. The results showed that the addition of 15% POPP to PC/ABS could achieve UL-94 V-0 grade with LOI value of 21.1%. The cone test showed that peak of heat release rate and total heat release decreased by 41.7% and 31.1%,respectively. TGA and SEM analysis demonstrated that the modified PC/ABS alloy exhibited better char forming effect,which promoted the formation of dense porous carbon layer on the surface after combustion,and effectively insulated the oxygen to improve the flame retardant properties of the material.