PP/EG/MWNTs导热复合材料试验对比

PP/EG/MWNTs Thermal Conductive Composite Test Comparison

利用高温膨胀插层工艺制备PP/EG/MWNTs导热复合材料,对比置于室温、800℃、900℃3种条件下制备的导热复合材料的热性能和力学性能,试验结果表明,经900℃高温膨胀后,PP/EG/MWNTs热导率可达1.51 W/(m·K),比纯PP的热导率提高了487.5%,与室温和800℃条件下制备的PP/EG/MWNTs相比,热稳定性和拉伸强度均得到有效增强,但缺口冲击强度没有明显变化。结合微观形貌可知,高温可使MWNTs进入膨胀后的EG层间,将复合材料结构空间填实后,有利于形成导热网络,从而提高了复合材料的热性能和力学性能。

PP/EG/MWNTs thermal conductive composite was prepared by high temperature expansion intercalation process. The thermal properties and mechanical properties of the composite prepared at three conditions of room temperature, 800 ℃ and 900 ℃ were contrasted,the test results showed that the thermal stability and tensile strength effectively had been enhanced after the expansion at conditions of 900 ℃ than at room temperature and 800 ℃ ,and the thermal conductivity of PP/ EG/MWNTs could reach 1.51 W/（ m· K） that increased by 487.5 % compared with pure PP, but the notched impact strength had no obvious change. According to the micromorphology, MWNTs could insert the interlay of EG at high temperature,which could make the composite structure space closely and advantageous to the formation of thermal network, the thermal properties and mechanical properties of the composites were improved.