In situ observation of electric field induced agglomeration of carbon black in epoxy resin
- 1 June 1998
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 72 (22) , 2903-2905
- https://doi.org/10.1063/1.121454
Abstract
This letter reports on the influence of a static electric field applied by metal electrodes on the agglomeration process of carbon black (CB) in epoxy resin. The growth of dendrites from the anode into the material is observed in situ by optical transmission microscopy. A percolating network is seen to form, combined with a drastic reduction in the sample resistivity. This behavior can be explained by taking into account the electrostatic interaction of the charged CB particles. The final resistance for composites with a given CB content can be controlled within a range of several decades by varying the applied voltage and the curing temperature of the mixture.Keywords
This publication has 7 references indexed in Scilit:
- Agglomeration and electrical percolation behavior of carbon black dispersed in epoxy resinJournal of Applied Polymer Science, 1997
- High-Dilution Carbon-Black/Polymer Composites: Hierarchical Percolating Network Derived from Hz to THz ac ConductivityPhysical Review Letters, 1997
- Measurement and interpretation of nonuniversal critical exponents in disordered conductor–insulator compositesPhysical Review B, 1995
- Models proposed to explain the electrical conductivity of mixtures made of conductive and insulating materialsJournal of Materials Science, 1993
- Conducting filled polymersPhysica A: Statistical Mechanics and its Applications, 1989
- Effect of melt viscosity and surface tension of polymers on the percolation threshold of conductive-particle-filled polymeric compositesJournal of Macromolecular Science, Part B, 1986
- Percolation and ConductionReviews of Modern Physics, 1973