"Ex situ" concept for toughening the RTMable BMI matrix composites, part I: Improving the interlaminar fracture toughness

Qunfeng Cheng, Zhengping Fang, Xiao Su Yi, Xuefeng An, Bangming Tang, Yahong Xu

Research output: Journal PublicationArticlepeer-review

46 Citations (Scopus)

Abstract

Aerospace-grade bismaleimide matrix composites was toughened based on a novel ex situ resin transfer molding (RTM) technique using a special manufactured ES™ carbon fabrics. The toughening mechanism and toughening effect by the technique are studied using thermoplastic PAEK as toughener. Mode I fracture toughness (Gic) of the composites toughened by ex situ RTM technique increased up to three times higher than that of the control system, and Mode II fracture toughness (GC) increased two times higher as well. The composite without toughening was denoted as control system. The microstructure revealed that a reaction-induced phase decomposition and inversion happened in the interlaminar region, which resulted in a particles morphology that showed the thermosetting particles were surrounded with the PAEK phase. The plastic deformation and rupture of the continuous PAEK phase are responsible to the fracture toughness improvement. And the influence of PAEK concentration on toughness improvement was also investigated.

Original languageEnglish
Pages (from-to)1625-1634
Number of pages10
JournalJournal of Applied Polymer Science
Volume109
Issue number3
DOIs
Publication statusPublished - 5 Aug 2008
Externally publishedYes

Keywords

  • Ex situ RTM technique
  • Fractography
  • Fracture toughness
  • Resin transfer molding
  • Toughening mechanism

ASJC Scopus subject areas

  • Chemistry (all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint

Dive into the research topics of '"Ex situ" concept for toughening the RTMable BMI matrix composites, part I: Improving the interlaminar fracture toughness'. Together they form a unique fingerprint.

Cite this