Degradation of silicone rubber analyzed by instrumental analyses and dielectric spectroscopy

Yoshimichi Ohki, Naoshi Hirai, Daomin Min, Liuqing Yang, Shengtao Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Silicone rubber (SiR) was gamma irradiated at 125, 145 and 185 °C or thermally aged at 220, 250 and 280 °C and the resultant changes in performance were evaluated. It has become clear from instrumental analyses that crosslinking via oxidation of silicon atoms and chain scission are induced by gamma rays. Furthermore, from the temperature dependence of real relative permittivity at high frequencies, the thermal expansion coefficient was found to become smaller with the increase in dose. These results can be understood well by the chemical and structural changes in SiR induced by the degradation.

Original languageEnglish
Title of host publicationProceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors
PublisherSpringer International Publishing
Pages107-116
Number of pages10
ISBN (Print)9783319684536
DOIs
Publication statusPublished - 2018 Jan 1
Event18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors, 2017 - Portland, United States
Duration: 2017 Aug 132017 Aug 17

Publication series

NameMinerals, Metals and Materials Series
VolumePart F11
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Other

Other18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors, 2017
CountryUnited States
CityPortland
Period17/8/1317/8/17

Keywords

  • Aging
  • Complex permittivity
  • Degradation
  • Gamma rays
  • High temperature
  • SiR

ASJC Scopus subject areas

  • Metals and Alloys
  • Materials Chemistry
  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials
  • Energy Engineering and Power Technology

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  • Cite this

    Ohki, Y., Hirai, N., Min, D., Yang, L., & Li, S. (2018). Degradation of silicone rubber analyzed by instrumental analyses and dielectric spectroscopy. In Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors (pp. 107-116). (Minerals, Metals and Materials Series; Vol. Part F11). Springer International Publishing. https://doi.org/10.1007/978-3-319-68454-3_10