Electrical conductivity modelling of polypropylene composites with carbon fillers

International Workshop "Advanced Technologies in Material Science, Mechanical and Automation Engineering – MIP: Engineering – 2019"

材料科学;机械制造;原子能学

Stepashkina, A.S.^1 ; Chizhkova, E.A.^2 ; Mishura, T.P.^1 ; Tselms, R.N.^1

Saint Petersburg State University of Aerospace Instrumentation, St. Petersburg, Russia^1

EPAM Systems, St. Petersburg, Russia^2

关键词: Dielectric layer;    Electrical conductivity;    Filler particles;    ITS evaluation;    Percolation thresholds;    Polypropylene composite;    Polypropylene matrices;    Theoretical values;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/537/2/022012/pdf
DOI  :  10.1088/1757-899X/537/2/022012

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Samples of a composite material based on polypropylene matrix and carbon fillers (carbon black and carbon nanofibers) were obtained. It was experimentally shown that the dependences of the electrical conductivity on the filler mass fraction have a threshold nature/When the mass fraction of the filler is higher than the threshold the values of the electrical conductivity increases by more than 8-10 orders. Determination of the electrical conductivity value near the percolation threshold is difficult. In the article the simulation method was proposed which considers the presence of a dielectric layer between the filler particles, presented a method for its evaluation: the percolation curve near the percolation threshold was described. A fairly good agreement between the experimental and theoretical values of conductivity for various geometries and types of fillers is shown in this work.