Interlaminar morphology effects on fracture resistance of amorphous polymer-modified epoxy/carbon fibre composites

E. M. Woo, K. L. Mao

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Effects of three amorphous thermoplastic polymers used as interlaminar toughening particles in carbon fibre/epoxy laminated composites have been compared. Mode I and mode II delamination fracture toughness were characterized using double cantilever beam and end-notched flexure specimens, respectively, and the delaminated surfaces of specimens were examined using scanning electron microscopy to investigate the interlaminar morphology after fracture. This study showed that the poly(ether imide)-modified and phenoxy-modified systems exhibited similar improvement. The interlaminar morphology in these two systems is compared and discussed. Surprisingly, incorporation of bisphenol-A polycarbonate (PC), with its solvent-induced crystallinity during particulate preparation, induced only very little improvement in the modified composite system. The microstructural morphology at the PC/epoxy interlaminar region showed insoluble chunks of PC domains with crystals, the brittleness and lack of wetting with the epoxy phase adversely affected the macroscopic mechanical fracture behaviour.

Original languageEnglish
Pages (from-to)625-631
Number of pages7
JournalComposites Part A: Applied Science and Manufacturing
Volume27
Issue number8 PART A
DOIs
Publication statusPublished - 1996 Jan 1

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials

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