氢氧化铝对PE-HD/木粉复合材料阻燃性能和力学性能的影响

Influence of Aluminium Hydroxide on Flame Retardancy and Mechanical Properties of PE-HD/Woodflour Composites

对Al(OH) 3 阻燃的高密度聚乙烯 /木粉复合材料研究结果表明 :随木粉和Al(OH) 3 添加量的增加 ,Al(OH) 3对复合材料的阻燃效率增加 ,高木粉添加量的复合材料氧指数达 2 7.1% ,Al(OH ) 3 的阻燃效率达 0 2 0 3。增加木粉含量 ,复合材料的拉伸强度和弯曲强度明显提高 ;但Al(OH) 3 对拉伸强度的影响不大 ,而明显提高弯曲强度。增加木粉和Al(OH) 3 的含量 ,均能明显降低复合材料的冲击强度 ,破坏复合材料的韧性。

Flame retardancy and mechanical properties of the composites of high-density polyethylene, woodflour and aluminium hydroxide (Al(OH) 3) were investigated. The flame retarding efficiency of the composites increased with increasing content of woodflour and Al(OH) 3, with a limiting oxygen index of 27.1 % and a flame retarding efficiency of Al(OH) 3 of 0.203 being obtained. While woodflour improved both the tensile and flexural strengths, Al(OH) 3 improved the flexural strength only. However, both woodflour and Al(OH) 3 were harmful to the unnotched izod impact strength of the composites.