煤基聚乙烯/蒙脱土复合材料的阻燃特性

研究了以聚磷酸铵(APP)、季戊四醇(PER)和三聚氰胺(MEL)复配成的膨胀型阻燃荆、煤及蒙脱土阻燃协同作用及其对煤基聚乙烯／蒙脱土复合材料阻燃性能的影响。少量蒙脱土即可显著提高聚乙烯的极限氧指数。超细煤粉的含量在一定范围内可明显提高聚乙烯／蒙脱土复合材料的极限氧指数．煤、蒙脱土及膨胀型阻燃剂之间存在良好的协同阻燃效应．可使聚乙烯的极限氧指数得到一定的提高。热氧化分解及红外光谱分析表明，煤、蒙脱土及膨胀型阻燃荆之间的协同阻燃效应与煤基聚乙烯／蒙脱土阻燃材料具有良好的热稳定性和较高的残炭率有关。

STUDIES ON FLAME RETARDANTED PROPERTY OF COAL-BASED POLYETHELYENE/MONTMORILLONITE COMPOSITES

Ammonium Polyphosphate (APP)-pentaerythritol(PER)-melamine(MEL) copolymer is selected as an intumescent flame retardant (IFR), it has synergist flame retardant effect between coal and montmorillonite, and it affects the flame retardanted property of coal-based polyethelyene/montmorillonite composites. A little montmorillonite can greatly improve the limiting oxygen index(LOI) of polyethelyene. The given content of coal can improve greatly the limiting oxygen index(LOI) of polyethelyene/montmorillonite composites. Coal and montmorillonite and intumescent flame retardant (IFR) have good synergist flame retardant effects. And the synergist effects of coal, montmorillonite and intumescent flame retardant can improve the limiting oxygen index(LOI) of polyethelyene enormously. Thermo-oxidative degradation and real time FT-IR data show that the synergist flame retardanted effect of coal and montmorillonite and intumescent flame retardant in with to coal-based polyethelyene/montmorillonite composites has good heat stabilization and upper char rates greatly.