Epoxy Resin/Carbon Black Composites Below the Percolation Threshold

Antonino Cataldo, Micciulla, Paddubskaya, Cataldo, Stefanutti, Fierro, Sergey Maksimenko, Kuzhir, Macutkevic, Celzard, Banys, Maksimenko, Bellucci

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15 Citations (Scopus)

Abstract

A set of epoxy resin composites filled with 0.25–2.0 wt.% of commercially available ENSACO carbon black (CB) of high and low surface area (CBH and CBL respectively) has been produced. The results of broadband dielectric spectroscopy of manufactured CB/epoxy below the percolation threshold in broad temperature (200 K to 450 K) and frequency (20 Hz to 1 MHz) ranges are reported. The dielectric properties of composites below the percolation threshold are mostly determined by alpha relaxation in pure polymer matrix. The glass transition temperature for CB/epoxy decreases in comparison with neat epoxy resin due to the extra free volume at the polymer-filler interface. At room temperature, the dielectric permittivity is higher for epoxy loaded with CBH additives. In contrast, at high temperature, the electrical conductivity was found to be higher for composites with CBL embedded. The established influence of the CB surface area on the broadband dielectric characteristics can be exploited for the production of effective low-cost antistatic paints and coatings working at different temperatures.
Original languageEnglish
Pages (from-to)5434-5439
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume13
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • Biomedical Engineering
  • General Materials Science
  • Condensed Matter Physics

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