磷酸脒基脲与聚磷酸铵协同阻燃的木粉/HDPE复合材料

Synergistic Fire Retarding Study of Guanylurea Phosphate and Ammonium Polyphosphate Treated Wood Flour/HDPE Composite

采用锥形量热仪(CONE)、极限氧指数(LOI)、热重分析(TGA)和力学试验等研究手段,分析聚磷酸铵(APP)、磷酸脒基脲(GUP)及二者复配(GUP/APP)对木粉/高密度聚乙烯(WF/HDPE)复合材料燃烧性能、热降解行为以及力学性能的影响。CONE研究结果表明:APP可显著降低WF/HDPE复合材料的热释放,但同时也使得复合材料的烟释放增加;将GUP与APP按适当比例复配不仅可以有效抑制复合材料的热释放,而且可以降低烟释放速率,表现出较好的协同阻燃和抑烟作用。TGA结果表明:GUP与APP复配使得WF/HDPE复合材料的初始热分解温度降低,残炭产率提高。此外,GUP和APP复配阻燃WF/HDPE复合材料具有较高的氧指数和较小的力学性能损失。

The effects of adding ammonium polyphosphate （APP）,guanylurea phosphate （GUP） and the mixtures of them on fire retardancy, thermal degradation behavior and mechanical properties of wood flour/high density polyethylene （WF/HDPE） composite were studied using cone calorimetry （CONE）, limited oxygen index （LOI）, thermogravimetric analysis （TGA） and mechanical test. The results of CONE showed that APP significantly reduced the heat release of WF/HDPE composite, while made the smoke emission increased. When compounding GUP with APP by an appropriate ratio, the composite displayed both low heat release and low smoke release, which indicated a good synergistic effect in fire inhibition and smoke suppression. The results of TGA showed that compounding GUP with APP made the initial thermal decomposition temperature of WF/HDPE composite decreased and improved the char residue. In addition, compounding GUP with APP not only increased the limited oxygen index but also had less negative effects on mechanical properties of the composite.