Evaluation of interlaminar-toughened poly(ether imide)-modified epoxy/carbon fiber composites

E. M. Woo, K. L. Mao

Research output: Contribution to journalArticle

27 Citations (Scopus)


Amorphous poly(ether imide) has been used as interlaminar toughening particulate agent in laminated carbon fiber/epoxy composites. Mode I and Mode II delamination fracture toughness was characterized using the double cantilever beam (DCB) and end-notched flexure (ENF) specimens. The delamination surface was examined using a scanning electron microscopy (SEM) to investigate relationships between the morphology and properties. The results revealed that the PEI-modified composites exhibited a significantly increased fracture toughness, which increased with the PEI content. GIC was improved from 165 to 540 J/m2 (at 1 mm/min crosshead speed). GIIC was improved more significantly from 290 to 1300 J/m2. It is believed that these values could be further improved if the processing cycle were to be optimized.

Original languageEnglish
Pages (from-to)799-805
Number of pages7
JournalPolymer Composites
Issue number6
Publication statusPublished - 1996 Jan 1

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

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