次磷酸铝对木粉/高密度聚乙烯复合材料阻燃及力学性能的影响  

Effects of Aluminum Phosphate on the Fire-Retardant and Mechanical Properties of Wood Flour/HDPE Composite

作　　者：陈婉[1] 赵凡[1] 郭知理 唐龙祥[1] 

机构地区：[1]合肥工业大学化学与化工学院,安徽合肥230009

出　　处：《高分子材料科学与工程》2017年第3期111-115,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51372059)

摘　　要：以次磷酸铝(AHP)为阻燃剂对高密度聚乙烯(HDPE)基木塑复合材料进行阻燃改性。采用锥形量热、垂直燃烧、极限氧指数(LOI)系统评价复合材料的阻燃性能。通过拉伸强度、无缺口冲击强度、弯曲强度等测试,探讨了复合材料的力学性能。并通过热失重分析、扫描电镜对AHP阻燃木粉/HDPE(WF/HDPE)复合材料的机理进行分析。结果表明,AHP、木粉(WF)及WF中的结合水构成膨胀阻燃体系,AHP质量分数为30%时,WF/HDPE复合材料达到垂直燃烧V-0级别,LOI值达到25.5%,阻燃性能显著提高。AHP的加入使WF/HDPE复合材料的力学性能有所下降。The wood flour/HDPE composites （WF/HDPE） was modified with aluminum phosphate （AHP） as flame retardant. The flame retardant properties of WF/HDPE composites were studied by UL-94, limiting oxygen index （LOI）, cone calorimeter test （CCT）, and mechanical properties were studied by measurements of tensile strength, unnotched impact strength and flexural strength. The flame retardant mechanism of AHP was investigated by thermogravimetric analysis （TGA） and scanning electron microscopy （SEM）. The results show that, AHP, WF and the bound water in WF construct an intumescent flame-retardant. When the mass fraction of AHP is 30%, WF/ HDPE composite achieves UL-94 V-0 rating, the oxygen index reaches 25.5 % and the flame retardant property is improved significantly. However, mechanical properties of WF/HDPE composites decrease to some extent due to addition of AHP.

关 键 词：木粉/高密度聚乙烯复合材料 次磷酸铝 阻燃性能 力学性能 阻燃机理 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]