导热聚乙烯/聚丙烯复合材料性能研究

Study on Properties of Thermally Conductive Polyethylene/Polypropllene Composite

以高密度聚乙烯和聚丙烯为基体材料,以碳纳米管和氮化硼颗粒为导热填料,通过熔融共混法制备了导热聚乙烯/聚丙烯复合材料;研究了聚乙烯和聚丙烯不同配比对复合材料力学性能和导热率的影响,同时探究了碳纳米管和氮化硼颗粒的配比对聚乙烯/聚丙烯复合材料力学性能、导热率、流动性、耐热性的影响。结果表明:复合材料的导热率随聚丙烯含量的增加而降低;当碳纳米管和氮化硼质量比为7∶3时,复合材料导热率最高,与不加导热填料的复合材料相比提高了30.46%。

High density polyethylene and polypropylene as matrix material,carbon nanotubes and boron nitride particles as conductivefiller were chosen to prepare a thermal conductive PE/PP composite material by melt blending method.The effects of different ratio of polyethylene and polypropylene on the mechanical properties and thermal conductivity of the composites were studied.Meanwhile,the effects of the ratio of carbon nanotubes and boron nitride particles on the mechanical properties,thermal conductivity,flow properties and heat resistance of PE/PP composites were explored.The results showed that the thermal conductivity of the composites decreased with the increase of the content of polypropylene,and when the mass ratio of carbon nanotubes and boron nitride was 7∶3,the thermal conductivity of the composites was the highest,and the composite materials were improved by 30.46%compared with the composites without the thermal conductivity fillers.