Similarity in degradation behavior by heat and irradiation between ethylene-propylene-diene rubber and silicone rubber

Yoshimichi Ohki, Hiromichi Kotani, Daichi Fujishima, Naoshi Hirai

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

2 Citations (Scopus)

Abstract

Flame retardant ethylene-propylene-diene rubber (FR-EPR) and silicone rubber (SiR) are two major materials for safety-related cables in nuclear power plants. For such cables, degradation of their insulation is a matter of serious concern. Regarding the above, sheets of FR-EPR and SiR were aged either thermally or concurrently by heat and gamma radiation and the resultant changes in various properties were systematically compared and analysed from various aspects by FT-IR, differential scanning calorimetry (DSC), thermogravimetry/differential thermal analysis (TG/DTA), and scanning probe microscopy (SPM), and by measuring indenter modulus, elongation at break (EAB), tensile strength (TS), and complex permittivity. As a result of the experiments, both FR-EPR and SiR become hard in a similar manner in both cases where the degradation was given by heat only or concurrently by heat and radiation. In both polymers, degradation induced cross-linking and breaking of chemical bonds were observed by FT-IR, DSC, TG/DTA. Furthermore, a contrastive difference in dielectric behavior between SiR and FR-EPR was also observed in complex permittivity.

Original languageEnglish
Title of host publicationCEIDP 2017 - IEEE Conference on Electrical Insulation and Dielectric Phenomenon
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages157-160
Number of pages4
Volume2017-October
ISBN (Electronic)9781538611944
DOIs
Publication statusPublished - 2018 Jan 12
Event2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon, CEIDP 2017 - Texas, United States
Duration: 2017 Oct 222017 Oct 25

Other

Other2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon, CEIDP 2017
CountryUnited States
CityTexas
Period17/10/2217/10/25

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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  • Cite this

    Ohki, Y., Kotani, H., Fujishima, D., & Hirai, N. (2018). Similarity in degradation behavior by heat and irradiation between ethylene-propylene-diene rubber and silicone rubber. In CEIDP 2017 - IEEE Conference on Electrical Insulation and Dielectric Phenomenon (Vol. 2017-October, pp. 157-160). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CEIDP.2017.8257481