A Study on the Prolonged Time Heat Resistance of Shielding Materials Based on Modified and Novolac Type Epoxy Resin

개질 및 노블락형 에폭시수지 차폐재의 장기내열성에 관한 연구

  • Received : 1998.05.14
  • Accepted : 1998.07.24
  • Published : 1998.11.10

Abstract

Effects of heating time under high temperature on the thermal and mechanical properties of neutron shielding materials based on modified (KNS-102), hydrogenated(KNS-106) bisphenol-A type epoxy resin and phenol-novolac(KNS-611) type epoxy resin for radioactive material shipping casks have been investigated. At early stages, the initial decomposition temperatures of the shielding materials of KNS-102, KNS-106 and KNS-611 increased with the heating time under high temperature, but it was rarely affected by the heating time in the later stages. In addition, the thermal conductivities of KNS-102 and KNS-106 decreased with heating time, but that of KNS-611 increased with the heating time. On the contrary, the thermal expansion coefficients of neutron shielding materials decreased with increase of heating time. At the high temperature, the tensile strength and flexural strength of the shielding materials of KNS-102 and KNS-611 increased with heating time, but those of KNS-106 decreased with increase of heating time. And the heating time under high temperature on the neutron shielding materials did not show measurable loss of weight and hydrogen content.

Acknowledgement

Supported by : 과학기술부

References

  1. J. Am. Ceram. Soc. v.72 J. P. Aleksander;A. A. Ilhan
  2. Trans. Am. Nucl. Soc. v.34 K. A. Blakely;M. F. Gaffney;P. T. B. Shaffer
  3. SAND78-2317 H. J. Rack;S. A. Dupree;J. F. Smugeresky
  4. IAEA-SM-286 H. Taniuchi;T. Iida;F. Matsuda;H. Nagahama
  5. AECL-9556 L. W. Dickson
  6. Trans. Am. Nucl. Soc. v.39 R. R. Burn;G.R. Blessing
  7. AECL-9084 C. B. Saunders;L. W. Dickson;A. Singh
  8. Radiat. Phys. Chem. v.29 H. Wilski
  9. J. Appl. Polym. Sci. v.27 Y. Morita;M. Hagiwara;N. Kasi
  10. J. Korean Ind. & Eng. Chem. v.7 S. H. Cho;J. B. Do;S. G. Ro;C. H. Do
  11. J. Korean Ind. & Eng. Chem. v.8 S. H. Cho;S. S. Hong;H. Y. Kim;J. B. Do;S. G. Ro
  12. Basic Principles of Membrane Technology M. Marcel
  13. Kuk Do Epoxy Technical Bulletin
  14. Thermal Characterization of Polymeric materials E. A. Turi
  15. RAMTRANS v.2 T. Iida;H. Taniuchi;K. Fujisawa