导热尼龙66复合材料的制备与性能研究

Preparation and Properties of Thermal Conductivity PA66 Composites

用共混挤出法制备导热尼龙(PA)66复合材料,研究了导热填料种类、含量及与玻璃纤维复配对复合材料导热系数的影响。结果表明,在选用的3种导热填料中以Al填充PA66的效果最好;当复合材料中填料粒子用量达到一定含量时,填料之间形成特殊的导热通路,提高复合材料的导热性能;随着填料含量的增加,复合材料的导热性能上升,当Al含量为45%时,复合材料的导热系数为0.778 W/(m·K);玻璃纤维与导热填料的共同作用使体系导热系数有一定提高。

Thermal conductivity PA66 composites reinforced by metal powder and oxide were prepared by blending extrusion method.The effects of filler variety and content, combination use with glass fiber on the thermal conductivity coefficient of composites were studied.The results showed that the composite filled with AI had best thermal conductivity. When the filler content reached a certain amount, the special conduction path could be formed between the filler, which could improve the thermal conductivity of composite.Increasing filler content could improve the thermal properties of composites, and PA66 composites with the thermal conductivity coefficient of 0.778 W/（m · K） was obtained when A1 content was 45%.The combination use of glass fiber and thermal conductive filler could enhance the thermal conductivity.