聚磷酸铵对聚丙烯／聚乙烯复合材料阻燃性能的影响

通过力学性能测试、氧指数测试研究了聚磷酸铵（APP）对聚丙烯（PP）／聚乙烯（PE）复合材料的力学性能和阻燃性能的影响。结果表明：APP的加入，PP/PE复合材料的拉伸强度开始增加，当添加量超过25％后，其拉伸强度开始降低；冲击强度是先增大后减小，但包覆APP变化的趋势比较大；氧指数逐渐增大．包覆APP的氧指数均好于硅烷处理APP的氧指数。

Influence of Ammonium Polyphosphate on the Flame-retardant Properties of Polypropylene/Polyethylene Composite

The effect of ammonium polyphosphat（APP） on the mechanical properties and flame-retardant properties of polypropylene （PP） / polyethylene （PE） composite was researched through the determinations mechanical and limitied oxygen index （LOI） tests. The results shows that the tensile strength starts to increase by adding APP, when a loading level is more than 25 percent, its tensile strength begins to reduce; impact strength firstly increases and then decreases after, but the trend of coated APP changes relatively large; oxygen index gradually increases, the oxygen index of coated APP is better than that of APP handled with silane.