抄録
Flame-retardant ethylene-propylene-diene copolymer, which is the polymer insulating material most abundantly used for safety-related electric cables in nuclear power plants, was irradiated with gamma-rays to certain designated doses from 500 to 1500 kGy at room temperature or 100 °C in air, and absorption spectra were measured at terahertz frequencies. A broad absorption is induced by the irradiation in a range from 0.5 to 3.1 THz. It is confirmed that this absorption is induced by oxidation, by comparing its frequency spectrum with spectra of polyethylene obtained numerically by doing quantum chemical calculations and experimentally by measuring its absorption at THz frequencies. Therefore, the degree of oxidation of this copolymer can be estimated by the intensity of the broad absorption at these THz frequencies.
| 本文言語 | English |
|---|---|
| ホスト出版物のタイトル | Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials |
| 出版社 | Institute of Electrical and Electronics Engineers Inc. |
| ページ | 544-547 |
| ページ数 | 4 |
| 巻 | 2015-October |
| ISBN（印刷版） | 9781479989034 |
| DOI | |
| 出版ステータス | Published - 2015 10月 8 |
| イベント | 11th IEEE International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015 - Sydney, Australia 継続期間: 2015 7月 19 → 2015 7月 22 |
Other
| Other | 11th IEEE International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015 |
|---|---|
| 国/地域 | Australia |
| City | Sydney |
| Period | 15/7/19 → 15/7/22 |
ASJC Scopus subject areas
- 電子材料、光学材料、および磁性材料
- 材料化学
- 凝縮系物理学