Phase structure of a toughened epoxy system

Ming Zhang, Xuefeng An, Bangming Tang, Xiaosu Yi

Research output: Journal PublicationArticlepeer-review

14 Citations (Scopus)


The SEM was employed to determine the phase structure of the toughened epoxy system, both in-situ and ex-situ system, respectively. The results of the in-situ blending system indicate that the phase reversion occurs when the thermoplastic (TP) content is 16.7%-20.0%. Spherical particle dimension of the phase-separated system was statistically analyzed, showing that the higher the TP component, the smaller the dimension and the narrower the dispersion of the spherical particle sizes. An experimental expression was obtained to establish the relationship between the TP content (p) and the particle dimension (d). Based on this expression it is estimated that the upper and lower limits of the particle dimension are 1.838 μm and 0.925 μm, respectively. For the ex-situ toughened resin, a multi-layer structure, i.e. toughened layer-interface layer-bulk layer, is formed. The content of TP keeps a high level in the toughened layer, followed by a dramatically drop in the adjacent plies; hardly any TP resin exists in the bulk layer. Also, the interface is expected of a relatively narrow thickness to achieve preferable toughness.

Original languageEnglish
Pages (from-to)13-17
Number of pages5
JournalFuhe Cailiao Xuebao/Acta Materiae Compositae Sinica
Issue number1
Publication statusPublished - Feb 2007
Externally publishedYes


  • Epoxy resin
  • Ex-situ toughness
  • In-situ blending toughness
  • Phase dimension
  • Statistic analysis

ASJC Scopus subject areas

  • Ceramics and Composites
  • General Chemistry
  • Condensed Matter Physics
  • Mechanics of Materials


Dive into the research topics of 'Phase structure of a toughened epoxy system'. Together they form a unique fingerprint.

Cite this