Fracture toughness of the nano-particle reinforced epoxy composite

Byung Chul Kim, Sang Wook Park, Dai Gil Lee*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

363 Citations (Scopus)


Although thermoset polymers have been widely used for engineering components, adhesives and matrix for fiber-reinforced composites due to their good mechanical properties compared to those of thermoplastic polymers, they are usually brittle and vulnerable to crack. Therefore, ductile materials such as micro-sized rubber or nylon particles are added to thermoset polymers are used to increase their fracture toughness, which might decrease their strength if micro-sized particles act like defects. In this work, in order to improve the fracture toughness of epoxy adhesive, nano-particle additives such as carbon black and nanoclay were mixed with epoxy resin. The fracture toughness was measured using the single edge notched bend specimen at the room (25 degrees C) and cryogenic temperature (-150 degrees). From the experimental results, it was found that reinforcement with nano-particles improved the fracture toughness at the room temperature, but decreased the fracture toughness at the cryogenic temperature in spite of their toughening effect. (C) 2008 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)69-77
Number of pages9
JournalComposite Structures
Issue number1-3
Publication statusPublished - Nov 2008
Event14th International Conference on composite Structures - Melbourne, Australia
Duration: 19 Nov 2007 → …

Structured keywords

  • Bristol Composites Institute ACCIS


  • fracture toughness
  • epoxy adhesive
  • nano-particle
  • carbon black
  • nanoclay
  • cryogenic temperatures


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