Mechanical and thermal properties of graphite platelet/epoxy composites

Asma Yasmin, Isaac M Daniel

Research output: Contribution to journalArticlepeer-review

393 Scopus citations

Abstract

Anhydride-cured diglycidyl ether of bisphenol A (DGEBA) reinforced with 2.5-5% by weight graphite platelets was fabricated. The structural, mechanical, viscoelastic and thermal properties of these composites were studied and compared. XRD studies indicated that the processing of composites did not change the original d-spacing of pure graphite. Tensile property measurements of composites indicated higher elastic modulus and tensile strength with increasing concentration of graphite platelets. The storage modulus and glass transition temperatures (Tg) of the composites also increased with increasing platelet concentration, however, the coefficient of thermal expansion decreased with the addition of graphite platelets. The thermal stability was determined using thermogravimetric analysis. The composites showed higher thermal stability in comparison with pure epoxy and increased char concentration for higher graphite concentration. The effects of reinforcement on the damage mechanisms of these composites were investigated by scanning electron microscopy.

Original languageEnglish (US)
Pages (from-to)8211-8219
Number of pages9
JournalPolymer
Volume45
Issue number24
DOIs
StatePublished - Jan 1 2004

Keywords

  • Composites
  • Epoxy
  • Graphite platelets

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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