金属离子改性MPP协效ADP阻燃玻纤增强聚酰胺6

Metal ion modified MPP synergistic ADP flame retardant glass fiber reinforced polyamide 6

摘要:

采用多种金属离子对三聚氰胺聚磷酸盐（MPP）进行改性，得到的金属离子改性MPP（简称J-MPP）与二乙基次膦酸铝（ADP）复配使用，旨在提高玻纤增强聚酰胺6（PA6/GF）复合材料的阻燃性能，并探究不同金属离子对该阻燃体系性能的具体影响。研究结果表明：与未改性的PA6/GF/MPP体系相比，含J-MPP的复合材料表现出更优异的阻燃性能，特别是含有经铝离子（Al）表面改性的MPP（Al-MPP）的PA6/GF/Al-MPP复合材料，在垂直燃烧测试中达到UL-94 V-0等级，极限氧指数（LOI）值高达31.7%。此外，该复合材料的总热释放量（THR）减少至139.1 MJ/m2，残炭量提升至41.5%，结果证实Al-MPP能显著提升PA6/GF复合材料在燃烧时的凝聚相阻燃效果。金属离子改性的MPP不仅提高了材料的阻燃性能，还有助于改善复合材料的力学属性。与PA6/GF/MPP相比，PA6/GF/J-MPP的力学性能有所增强，特别是PA6/GF/Mg-MPP的缺口冲击强度增加至8.5 kJ/m2，提高了14.9%。

Abstract:

A variety of metal ions were used to modify melamine polyphosphate (MPP),creating metal ion-modified MPP (referred to as J-MPP), which was then compounded with aluminum diethylphosphinate (ADP) to enhance the flame retardancy of PA6/GF composite materials. The investigation focused on the impact of different metal ions on the flame retardant and mechanical properties of the PA6/GF flame retardant system. The results demonstrated that the PA6/GF/J-MPP composites exhibited superior flame retardant performance compared to the PA6/GF/MPP system. Notably, the PA6/GF composite containing aluminum ion-modified MPP (Al-MPP) achieved a UL-94 V-0 rating in vertical burning tests, with a limiting oxygen index (LOI) reaching 31.7%. Additionally, the total heat release (THR) of the PA6/GF/Al-MPP composite was reduced to 139.1 MJ/m2, and the char residue increased to 41.5%, indicating that Al-MPP significantly improves the condensed phase flame retardant effect of the PA6/GF composite material. The introduction of metal ion-modified MPP also contributed to the enhancement of the composite material’s mechanical properties. Compared to the PA6/GF/MPP system, the PA6/GF/J-MPP composites showed improvements in mechanical performance, particularly the PA6/GF/Mg-MPP, whose notched impact strength increased to 8.5 kJ/m2, an increase of 14.9%.