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。
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(0.3744 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(0.2935 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.
作者
李程林
张豪
杜清源
安熠
郑秀婷
吴大鸣
孙靖尧
LI Chenglin;ZHANG Hao;DU Qingyuan;AN Yi;ZHENG Xuting;WU Daming;SUN Jingyao(School of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China;State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《塑料》
CAS
CSCD
北大核心
2023年第5期151-156,172,共7页
Plastics
基金
国家自然科学基金(52003019)
北京市自然科学基金(2204090)
北京化工大学引进人才项目(buctrc201909)。
关键词
多层注塑-多次压缩
导热性能
力学性能
聚合物基复合材料
聚合物形态
multilayer injection moulding-multiple compression
thermal conductivity
mechanical properties
polymer matrix composite
polymer forms
