阻燃PA66/二乙基次磷酸铝复合材料的研究
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摘要
通过双螺杆挤出机熔融共混制备了阻燃PA66/二乙基次磷酸铝(ADP)复合材料,采用极限氧指数(LOI)、垂直燃烧(UL94)测试、锥形量热仪(Cone)等研究了PA66/ADP材料的燃烧性能,同时还通过拉伸、弯曲强度测试考察了PA66/ADP复合材料的力学性能.研究表明:ADP添加量为8%时,该体系达到了UL94V-0级,LOI值由25. 3%提高到30. 2%. PA66/ADP材料的热释放速率峰值由1 168 k W/m2下降到535 k W/m2,添加ADP能够显著地增强成炭率,增强隔热作用.
Flame-retardant PA66/ADP composite was prepared by melt blending with a twin-screw extruder. The combusion,properties of these material were studied by limiting oxygen index(LOI),UL94 buring rating and cone calorimeter(Cone),and the mechanical properties of PA66/ADP materials were also examined through tensile and bending strength tests. It's shown that when the ADP is 8%,the system reaches UL94 V-0 level,and the LOI value increases from 25. 3% to 30. 2%.The peak heat release rate of PA66/ADP material decreases from 1 168 k W/m2 to 535 kW/m2. The addition of ADP can significantly increase the char formation rate and enhance the insulation effect.
Flame-retardant PA66/ADP composite was prepared by melt blending with a twin-screw extruder. The combusion,properties of these material were studied by limiting oxygen index(LOI),UL94 buring rating and cone calorimeter(Cone),and the mechanical properties of PA66/ADP materials were also examined through tensile and bending strength tests. It's shown that when the ADP is 8%,the system reaches UL94 V-0 level,and the LOI value increases from 25. 3% to 30. 2%.The peak heat release rate of PA66/ADP material decreases from 1 168 k W/m2 to 535 kW/m2. The addition of ADP can significantly increase the char formation rate and enhance the insulation effect.
引文
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