Improvement of Fracture Toughness of Epoxy Resins at Cryogenic Temperature

  • S. Nishijima
  • K. Yamada
  • M. Hussain
  • A. Nakahira
  • Y. Honda
  • T. Okada
  • K. Niihara
Part of the Advances in Cryogenic Engineering Materials book series (ACRE, volume 42)

Abstract

The improvement of the fracture toughness of epoxy resin has been tried to perform from the molecular level with an aim to improve the cryogenic properties of GFRP and/or the stability of superconducting magnets. The ceramic filler, which was formed by hydrolysis of alkoxide, was dispersed in the epoxy and cured. A coupling agent was also used to crosslink the filler and epoxy molecules. The positron annihilation lifetime was measured and the molecular state of the epoxies were evaluated. The thermal contraction and Vickers hardness were also measured. The thermal contraction and hardness were confirmed to reflect the molecular state as evaluated by positron annihilation lifetime. The fracture toughness was also measured down to cryogenic temperatures. It was found that the improvement of the fracture toughness at cryogenic temperatures is possible.

Keywords

Fracture Toughness Coupling Agent Vickers Hardness Molecular State Cryogenic Temperature 
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.

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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • S. Nishijima
    • 1
  • K. Yamada
    • 1
  • M. Hussain
    • 1
  • A. Nakahira
    • 1
  • Y. Honda
    • 1
  • T. Okada
    • 1
  • K. Niihara
    • 1
  1. 1.ISIR Osaka UniversityIbaraki, Osaka, 567Japan

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