A NEW SYNERGIST FOR INTUMESCENT FLAME RETARDANT POLYPROPYLENE
A NEW SYNERGIST FOR INTUMESCENT FLAME RETARDANT POLYPROPYLENE
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DOI：
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发表时间：
2002-08
影响因子：
4.3
通讯作者：
Qiang Wu;B. Qu
中科院分区：
文献类型：
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作者：
Qiang Wu;B. Qu
采用极限氧指数(LOI)、UL-94测试、热重分析(TGA)、实时傅里叶变换红外(FTIR)、激光拉曼光谱(LRS)研究了硅钨酸(SiW 1 2 )作为催化剂在磷氮化合物AM基膨胀阻燃(IFR)聚丙烯(PP)中的协同效应。 LOI数据表明，添加到PP/IFR系统中的SiW 1 2与名为AM的IFR添加剂具有协同FR效应。 TGA数据表明SiW 1 2明显提高了PP/IFR体系在高温(T > 500°C)下的热稳定性。 FTIR结果证明IFR可以提高PP的热稳定性，SiW 1 2 可以诱导更高的磷酸及其衍生物的生成速率。 LRS 测量提供了有关碳质微观结构的有用信息。总之，适量的SiW 1 2 (1.5 wt%)与IFR发挥协同作用，提高LOI值和高温热稳定性，并促进燃烧PP表面烧焦结构的形成。
The synergistic effects of silicotungstic acid (SiW 1 2 ) as a catalyst in the phosphorus-nitrogen compounds AM-based intumescent flame-retardant (IFR) polypropylene (PP) were studied using the limiting oxygen index (LOI),the UL-94 test, thermogravimetric analysis (TGA), real time Fourier transform infrared (FTIR), laser Raman spectroscopy (LRS). The LOI data show that SiW 1 2 added to PP/IFR systems has a synergistic FR effect with an IFR additive named AM. The TGA data show that SiW 1 2 apparently increases the thermal stability of the PP/IFR systems at high temperature (T > 500°C). The FTIR results provide the positive evidence that IFR can improve the thermal stability of PP and SiW 1 2 can induce a higher rate of formation of phosphoric acid and its derivatives. The LRS measurements provide useful information on the carbonaceous microstructures. In short, a suitable amount of SiW 1 2 (1.5 wt%) exerts synergistic effects with the IFR by increasing the LOI value and the thermal stability at high temperature and promoting the formation of charred structures on the burning PP surface.