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Journal of Materials Science

, Volume 42, Issue 8, pp 2766–2774 | Cite as

Fracture behaviours of epoxy nanocomposites with nano-silica at low and elevated temperatures

  • Shiqiang Deng
  • Lin YeEmail author
  • Klaus Friedrich
Article

Abstract

An investigation was conducted to characterize fracture behaviours of nano-silica modified epoxies at low and elevated temperatures. A nano-silica dispersed epoxy (Nanopox XP 22/0516, Hanse-Chemie, Germany) with 40 wt% silica nano-particles was used as modifier to toughen an epoxy resin, Araldite F (Bisphenol A based, Ciba-Geigy). Fracture toughness and other mechanical properties were measured using standard compact tension (CT), tensile and flexural specimens to elaborate the effects of nano-silica particles on fracture behaviours of epoxy nanocomposites at different temperatures, −50, 0, 23, 50 and 70 °C. Dynamic mechanical analysis (DMA) was utilized to define the glass transition temperature (Tg) upon the addition of different amounts of nano-silica particles. Fracture toughness of the nano-silica modified epoxies was clearly increased at 23 °C and 50 °C, but the role of nano-silica particles in enhancing the fracture toughness became less pronounced at 0 °C and −50 °C and disappeared at 70 °C.

Keywords

Epoxy Fracture Toughness Dynamic Mechanical Analysis Crack Opening Displacement Compact Tension 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgement

The authors thank C. Liu and H. Yang for their help in specimen preparation and conducting experiments. L Ye thanks the Alexander von Humboldt Foundation for the Friedrich Wilhelm Bessel Award for his research stay in Germany in 2005.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Centre for Advanced Materials Technology, School of Aerospace, Mechanical and Mechatronic EngineeringThe University of SydneySydneyAustralia
  2. 2.Institute for Composite MaterialsUniversity of KaiserslauternKaiserslauternGermany

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