PP/PCL/石墨/碳纳米管复合材料的制备及电性能分析  

Preparation and Electrical Properties of PP/PCL/Graphite/Carbon Nanotube Composites

作　　者：李俊 马文博 张泽辉 田昊 彭玉盈 LI Jun;MA Wenbo;ZHANG Zehui;TIAN Hao;PENG Yuying(Department of Materials and Chemical Engineering,Henan University of Engineering,Zhengzhou 450000,China)

机构地区：[1]河南工学院材料与化学工程学院,郑州450000

出　　处：《中国塑料》2020年第12期29-34,共6页China Plastics

基　　金：河南省科技攻关项目(192102310211);河南工程学院博士基金(D2018006)。

摘　　要：采用熔融共混法制备了石墨(G)、碳纳米管(CNTs)与聚丙烯(PP)、聚己内酯(PCL)导电复合材料,通过改变G的添加量制备了系列导电复合材料。主要测试了熔体流动速率、力学性能、导电性能、电热性能,并进行了电子显微镜观察结构、差示扫描量热法分析、热失重分析。结果表明,PCL与PP混合后,PP的拉伸强度提升了4.375 MPa,在加入G/CNTs之后,力学性能受影响较大下降了约73.5%;G/CNTs的加入还能有效降低PP的电阻率,使其从绝缘体变为半导体材料电阻率为7.83×106Ω·m;PP与PCL共混后复合材料的热稳定性得到了显著提高,初始分解温度从368.88℃升高至398.95℃,在加入G/CNTs管后又进一步提高至408.78℃。The conductive composites based on polypropylene(PP),polycaprolactone(PCL),graphite and carbon nanotubes(CNTs)were prepared by melt blending,and their microstructure,melting flow rate,mechanical properties,electrical conductivity,electro-thermal performance,and thermal stability were characterized.The results indicated that the fracture strength of PP increased by 4.375 MPa with the addition of PCL.However,its mechanical properties decreased by 73.5%when graphite and CNTs were further added.The incorporation of graphite and CNTs effectively reduced the resistivity of PP,leading to a transition from insulator to semiconductor with a resistivity of 7.83×106Ω·m.According to the thermogravimetry analysis,the introduction of PCL significantly improved the thermal stability of PP,resulting in an increase in initial decomposition temperature from 368.88°C to 398.95°C.Its initial decomposition temperature further increased to 408.78°C with the addition of graphite and CNTs.

关 键 词：聚丙烯 复合材料 碳纳米管 电热材料 

分 类 号：TQ327[化学工程—合成树脂塑料工业]