金属化合物在HDPE膨胀阻燃体系中的协同作用研究

研究了几种金属化合物对HDPE膨胀阻燃体系(IFR)的协同作用，通过极限氧指数（LOI）、DSC—TG、SEM对复合材料的阻燃、热稳定性和成炭情况进行研究，分析了金属化合物与膨胀阻燃剂协效作用机理。LOI测试显示：当ZEO、ZnO、Al2O3添加量分别为3%（质量百分比，下同）、1%、3%时，极限氧指数达到29.6%、29.0%、29.4%，比单独添加IFR分别高出4.6、4.0和4.4个百分点；DSC-TG和SEM结果表明：ZEO、ZnO、Al2O3主要通过促进PE-HD/IFR体系凝聚相快速成炭，稳定炭层强度来发挥其协效作用，而对最终成炭量贡献不大。

The Study of Synergism Between Metallic Compounds and IFR System

This paper studied the synergism effect between IFR and metallic compounds.The flame retardancy, thermal stability and the char layer were analyzed by LOI, DSC-TG and SEM.The synergism effect mechanism of metallic compounds was discussed.The LOI results show that, when the composition contained 3%ZEO, 1% ZnO and 3% Al2O3, LOI of 29.6, 29.0 and 29.4 were achieved. It was higher 4.6, 4.0 and 4.4 than IFR separately.The DSC-TG and SEM results indicate that ZEO, ZnO and Al2O3 can help the PE-HD/IFR to accelerate the formation of charring layer and strengthen it.But there is little contribution to the quality of the charring layer.