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首页> 外文期刊>e-Polymers >Fire retardancy effect of aluminium phosphinate and melamine polyphosphate in glass fibre reinforced polyamide 6
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Fire retardancy effect of aluminium phosphinate and melamine polyphosphate in glass fibre reinforced polyamide 6

机译：次膦酸铝和三聚氰胺多磷酸盐在玻璃纤维增​​强聚酰胺6中的阻燃效果

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摘要

The fire retardancy mechanism of aluminium diethyl phosphinate (AlPi) and AlPi in combination with melamine polyphosphate (MPP) was investigated in glass-fibre reinforced polyamide 6 (PA6/GF) by analysing the pyrolysis, flammability and fire behaviour. AlPi in PA6/GF-AlPi partly vaporises as AlPi and partly decomposes to volatile diethylphosphinic acid (subsequently called phosphinic acid) and aluminium phosphate residue. In fire a predominant gasphase action was observed, but the material did not reach a V-0 classification for the moderate additive content used. For the combination of both AlPi and MPP in PA6/GF-AlPi-MPP a synergistic effect occurred, because of the reaction of MPP with AlPi. Aluminium phosphate is formed in the residue and melamine and phosphinic acid are released in the gas phase. The aluminium phosphate acts as a barrier for fuel and heat transport, whereas the melamine release results in fuel dilution and the phosphinic acid formation in flame inhibition. The higher amount of aluminium phosphate in PA6/GF-AlPi-MPP stabilised the residue in flammability tests in comparison to PA6/GF-AlPi, so that this material achieved a V-0 classification in the UL 94 test.
机译：通过分析玻璃纤维增​​强聚酰胺6（PA6 / GF）的热解，可燃性和着火行为，研究了次膦酸二乙酯（AlPi）和AlPi与三聚氰胺多磷酸酯（MPP）的阻燃机理。 PA6 / GF-AlPi中的AlPi部分随着AlPi蒸发，部分分解为挥发性二乙基次膦酸（以下称次膦酸）和磷酸铝残留物。在火中，观察到主要的气相作用，但由于所用的中等添加剂含量，该材料未达到V-0分类。对于PA6 / GF-AlPi-MPP中的AlPi和MPP的组合，由于MPP与AlPi的反应，产生了协同作用。残留物中形成磷酸铝，而三聚氰胺和次膦酸在气相中释放。磷酸铝充当燃料和热传递的屏障，而三聚氰胺的释放导致燃料稀释和次膦酸的形成，从而抑制火焰。与PA6 / GF-AlPi相比，PA6 / GF-AlPi-MPP中较高含量的磷酸铝稳定了可燃性测试中的残留物，因此该材料在UL 94测试中达到了V-0分类。

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