Global and local conductivity in percolating crosslinked carbon black/epoxy–amine composites

Conductive particle-filled polymer composites are promising materials for applications where both the merits of polymer and conductivity are required. The electrical properties of such composites are controlled by the particle percolation network present in the polymeric matrix. In this study, the e...

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Bibliographic Details
Published in:Journal of materials science 2020-07, Vol.55 (21), p.8930-8939
Main Authors: Alekseev, A., Wu, T. H., van der Ven, L. G. J., van Benthem, R. A. T. M., de With, G.
Format: Article
Language:English
Subjects:
Amines
Atomic force microscopy
Carbon black
Carbon-epoxy composites
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Composites & Nanocomposites
Contact resistance
Crosslinking
Crystallography and Scattering Methods
Diffusion
Electric contacts
Electric properties
Electrical conductivity
Electrical properties
Electrical resistivity
Epoxy resins
Image reconstruction
Materials Science
Particulate composites
Percolation
Polymer matrix composites
Polymer Sciences
Room temperature
Solid Mechanics
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Summary:Conductive particle-filled polymer composites are promising materials for applications where both the merits of polymer and conductivity are required. The electrical properties of such composites are controlled by the particle percolation network present in the polymeric matrix. In this study, the electrical properties of crosslinked carbon black–epoxy–amine (CB-EA) composites with various CB concentrations are studied at room temperature as a function of the AC frequency f . A transition at critical frequency f c from the DC plateau σ DC to a frequency-dependent part was observed. Conductivity mechanisms for f  >  f c and f    f c was verified to be intra-cluster charge diffusion. For f  
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-020-04650-2