【摘要】 为了解决电子设备的散热问题，提高电子设备的稳定性和使用寿命，采用注射成型(IM)和注射压缩(IC)2种不同的加工方法制备具有优良性能的聚丙烯(PP)粒料/石墨烯微米片(Gmp)及PP粉料/Gmp复合材料，PP粒料/Gmp和PP粉料/Gmp复合材料中的Gmp填料含量分别为6%、8%和10%。为了研究不同的加工方法对复合材料的力学性能和热导率的影响，采用IC(6×0.5 mm)制备的PP粒料/10%Gmp复合材料(0.374 4 W/(m·K))具有较好的导热性，与采用IM制备的PP粒料/10%Gmp复合材料(0.293 5 W/(m·K))相比，提高了27.56%。此外，PP粒料/10%Gmp复合材料具有较好的力学性能，拉伸强度和断裂伸长率分别为20.921 MPa和9.309%。IM方法在连续生产导热复合材料领域具有较大的发展潜力。更多还原

【Abstract】 In order to solve the problem of heat dissipation in electronic devices, the stability and lifetime of electronic devices were improved. Reports on polypropylene(PP) pellets/graphene nanosheets(Gmp), PP powder/Gmp composite with excellent properties, which were prepared by two different methods: injection moulding(IM) and injection compression(IC). The Gmp filler content in the PP pellets/Gmp and PP powder/Gmp composite was 6%, 8% and 10 %. To investigate the effect of different processing methods on the mechanical properties and thermal conductivity of the composite, the PP pellet/10%Gmp composite(0.374 4 W/(m·K)) prepared by IC(6×0.5 mm) had good thermal conductivity, which was 27.56% higher than that of the PP pellet/10%Gmp composite(0.293 5 W/(m·K)) prepared by IM. In addition, the PP pellet/10%Gmp composite had good mechanical properties(tensile strength and elongation at break of 20.921 MPa and 9.309% respectively). This IM method had great potential for the continuous production of thermally conductive composite.更多还原