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探究了160℃温度下不同热氧老化时间对溴化环氧树脂(BEP)阻燃长玻纤增强尼龙6(PA6/LGF/BEP)复合材料性能的影响。通过热重分析(TGA)、氧指数(LOI)及锥形量热仪测试,分析了不同热氧老化时间下PA6/LGF/BEP复合材料的热稳定性、阻燃性能、燃烧性能。结果表明:热氧老化时间的延长对PA6/LGF/BEP复合材料的热稳定性影响不大,但热氧老化时间的延长使复合材料的氧指数由25%降低到23.2%,最大热释放速率由138 kW/m~2增加到316 kW/m~2,火势增长指数由1.31 kW/(m~2·s)增加到3.01 kW/(m~2·s),这表明随着热氧老化时间的延长,该复合材料的阻燃性能下降,火灾安全性逐渐降低。
The effect of different thermal aging time on the properties of brominated epoxy resin (BEP) flame retardant long glass fiber reinforced nylon 6 (PA6 / LGF / BEP) composites was investigated at 160 ℃. The thermal stability, flame retardancy and combustibility of PA6 / LGF / BEP composites were analyzed by TGA, LOI and cone calorimeter. The results show that the thermal aging of PA6 / LGF / BEP composite has little effect on the thermal stability of PA6 / LGF / BEP composites. However, the extension of thermal aging time decreases the oxygen index of composites from 25% to 23.2%, and the maximum heat release rate From 138 kW / m 2 to 316 kW / m 2, the fire growth index increased from 1.31 kW / (m 2 · s) to 3.01 kW / (m 2 · s), indicating that with the thermal aging With the extension of time, the flame retardant properties of the composite materials decrease and fire safety is gradually reduced.