Electrical behavior of a graphene/PEKK and carbon black/PEKK nanocomposites in the vicinity of the percolation threshold

被引：8

作者：

Bessaguet C. ^{[1
,2
,3
]}

Dantras E. ^{[2
]}

Michon G. ^{[3
]}

Chevalier M. ^{[1
]}

Laffont L. ^{[4
]}

Lacabanne C. ^{[2
]}

机构：

[1] Institut de Recherche Technologique (IRT) Saint Exupéry, 118 route de Narbonne, CS 44248, Cedex 4, Toulouse

[2] CIRIMAT, Université de Toulouse, CNRS, UPS, Physique des Polymères, 118 route de Narbonne, Cedex 09, Toulouse

[3] Institut Supérieur de l'Aéronautique et de l'espace, Institut Clément Ader, 3 rue Caroline Aigle, Toulouse

[4] CIRIMAT, Université de Toulouse, CNRS, INPT, ENSIACET, 4 allée Emile Monso, CS44362, Toulouse

来源：

Journal of Non-Crystalline Solids | 2020年 / 512卷

关键词：

Carbon black; Conductive nanocomposite; Dielectric permittivity; Electrical conductivity; Graphene; Mechanical moduli; Percolation threshold; Poly(ether ketone ketone);

D O I：

10.1016/j.jnoncrysol.2019.02.017

中图分类号：

学科分类号：

摘要：

Graphene and carbon black have been dispersed in a high performance thermoplastic polymer, the poly(ether ketone ketone), to improve its electrical conductivity. The dispersion of graphene has a significant influence on the percolation threshold. A simple exfoliation protocol to obtain graphene monolayers has led to a significant decrease of the percolation threshold from 4.2 to 1.9 vol%. To the best of our knowledge, it is one of the lowest percolation values for unfunctionalized graphene dispersed by melt blending in a high performance thermoplastic matrix. The conductivity value above the percolation threshold (1.2 S·m −1 ) means that graphene was not degraded during the elaboration process. Below the percolation threshold, Maxwell-Wagner-Sillars phenomenon increases the dielectric permittivity from 2.7 to 210 for PEKK/6 vol% graphene at 180 °C and 1 Hz. Dynamic mechanical analyses have shown that mechanical moduli were not significantly modified by conductive particles until 6 vol%. © 2019 Elsevier B.V.

引用

页码：1 / 6

页数：5

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