MnO_2对APP-PER-MA膨胀阻燃体系热解过程的协同作用

从热重分析、热解活化能以及红外光谱等几个方面研究了氧化锰(MnO2)对以聚磷酸铵(APP)为酸源,季戊四醇(PER)为炭源,蜜胺为气源的经典膨胀型阻燃剂(IFR)热分解性能的影响。从傅立叶红外光谱的角度看,300~400℃时MnO2的存在加快了体系的分解和无机酸的生成速度,改变了IFR热解发生的时间,但是并没有从根本上改变热解过程。从表观活化能的角度看MnO2的添加提高了IFR阻燃剂第一、二阶段的热解活化能,降低了第三、四阶段的热解活化能。热重分析显示MnO2对IFR分解最后阶段残留量影响最大。

Synergistic Effect of MnO2 on APP-PER-MA Intumescent Flame Retardant System

The synergistic effect of MnO2on APP-PER-MA intumescent flame retardant （IFR） system with using ammonium polyphosphate （APP） as acid source, pentaerythritol （PER） as carbon source and melamine （MA） as gas source was investigated by thermogravimetry analysis （TGA）, thermal-degradation activation energy and Fourier transform infrared spectrometer （FTIR）. It was clearly to see that MnO2 increased the degradation of system and the creating of inorganic acid at 300-400℃ from the FTIR. MnO2 changed the degradation time of IFR but not the process of the degradation in fact. Apparent activation energy analysis showed that MnO2 increased the activation energy of IFR in the first decomposed stage and reduced it in the other stages. And TGA showed there was a great effect on the residue of IFR in every decomposed stage when MnO2 was added.