Abstract Pyrolysis and fire behaviour of palygorskite (Pal) fibrous clay (5 wt%) reinforced polyamide 11 nanocomposites prepared by melt compounding were investigated in combination with melamine polyphosphate (MPP). Palygorskite was modified by 3-amino-propyl-triethoxysilane (APTES). Thermal stability and combustion behaviour of the materials were studied by thermogravimetric analysis (TGA), pyrolysis combustion flow calorimeter (PCFC) and cone calorimeter. TGA data showed that MPP reduced the thermal stability of PA11 nanocomposites, whereas the addition of both unmodified and modified palygorskite improved this property. Further, the cone calorimeter and PCFC results indicated a significant decrease in the peak of heat release rate (pHRR) and the total heat release (THR) of PA11 nanocomposites. This also means that the PA11 combustion was strongly reduced in the presence of combined Pal with MPP, being however more pronounced for the modified palygorskite. The improved fire behaviour could be attributed to a synergistic effect between Pal and MPP.

中文翻译：

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坡缕石和三聚氰胺聚磷酸盐对聚酰胺11纳米复合材料阻燃性能的综合影响

摘要 结合三聚氰胺聚磷酸盐（MPP）研究了通过熔融复合制备的坡缕石（Pal）纤维粘土（5wt%）增强聚酰胺11纳米复合材料的热解和燃烧行为。坡缕石由 3-氨基-丙基-三乙氧基硅烷 (APTES) 改性。通过热重分析(TGA)、热解燃烧流动量热仪(PCFC)和锥形量热仪研究了材料的热稳定性和燃烧行为。TGA 数据表明 MPP 降低了 PA11 纳米复合材料的热稳定性，而未改性和改性坡缕石的添加改善了这一特性。此外，锥形量热仪和 PCFC 结果表明 PA11 纳米复合材料的放热率峰值 (pHRR) 和总放热 (THR) 显着降低。这也意味着 PA11 燃烧在 Pal 与 MPP 的组合存在下大大降低，但对于改性坡缕石更为明显。改进的防火性能可归因于 Pal 和 MPP 之间的协同效应。