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首页> 外文期刊>Polymers for advanced technologies >Effect of boron containing materials on flammability and thermal degradation of polyamide-6 composites containing melamine cyanurate
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Effect of boron containing materials on flammability and thermal degradation of polyamide-6 composites containing melamine cyanurate

机译：含硼材料对三聚氰胺氰尿酸酯聚酰胺6复合材料可燃性和热降解的影响

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摘要

Three different boron containing materials, zinc borate (ZnB), borophosphate (BPO_4), and boron and silicon containing oligomer (BSi), were used to improve the flame retardancy of melamine cyanurate (MC) in a polyamide-6 (PA-6) matrix. The combustion and thermal degradation characteristics were investigated using limiting oxygen index (LOI), UL-94 standard, thermogravimetric analysis-Fourier transform infrared spectroscopy (TGA-FTIR), differential scanning calorimeter (DSC), and scanning electron microscopy (SEM). All the three boron compounds showed no synergistic effect with MC, and only BPO_4 at high loadings showed comparable LOI values by increasing the dripping rate. For ZnB and BSi glassy film and char formation decreases the dripping rate and sublimation of melamine and give rise to low LOI. According to TGA-FTIR results, addition of boron compounds does not alter the gaseous product distribution of both MC and PA-6. The addition of boron compounds affects flame retardancy through physical means. It was noted from the TGA data that boron compounds reduced the decomposition temperature of both MC and PA-6, also affecting the flame retardancy negatively by premature degradation of MC at low temperatures.
机译：三种不同的含硼材料硼酸锌（ZnB），硼磷酸盐（BPO_4）以及含硼和硅的低聚物（BSi）用于改善聚酰胺6（PA-6）中三聚氰胺氰尿酸酯（MC）的阻燃性矩阵。使用极限氧指数（LOI），UL-94标准，热重分析-傅立叶变换红外光谱（TGA-FTIR），差示扫描量热仪（DSC）和扫描电子显微镜（SEM）研究了燃烧和热降解特性。三种硼化合物均未显示出与MC的协同作用，只有高负载下的BPO_4通过增加滴注速率显示出可比的LOI值。对于ZnB和BSi玻璃质膜，形成焦炭会降低滴水速率和三聚氰胺的升华，从而降低LOI。根据TGA-FTIR结果，添加硼化合物不会改变MC和PA-6的气态产物分布。硼化合物的添加通过物理方式影响阻燃性。从TGA数据中注意到，硼化合物降低了MC和PA-6的分解温度，并且还由于低温下MC的过早降解而对阻燃性产生了负面影响。

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