Dielectric Properties and Insulation Diagnosis of Polymers by Ultra-wideband Dielectric and Absorption Spectroscopy

超宽带介电光谱和吸收光谱研究聚合物的介电性能和绝缘诊断

• 批准号: 24656218
• 负责人: OHKI Yoshimichi
• 金额: $ 2.58万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24656218/
• 关键词: 誘電体; 高分子; 広帯域分光; テラヘルツ時間領域分光; 複素誘電率; 絶縁劣化; 状態監視

The objective of this research is the understanding of dielectric properties of polymer films through measurements of permittivity and absorption spectra in an ultrawide-band frequency range.In FY 2012, permittivity spectra were obtained for seven kinds of polymers by the free-space method at GHz frequencies for the purpose of getting useful information on the future ultrafast wideband communication system. The essentials of this research were submitted as a refereed paper. In FY 2013, absorption spectra induced in cross-linked polyethylene by gamma-ray assisted oxidation were analyzed experimentally and numerically using quantum chemical calculations. As a result, it can be clarified that the absorption is due to resonance vibrations induced by the phenomenon that optically inactive lattice vibrations become active through oxidation-induced structural changes. In addition, possibilities of detecting the degradation of ethylene-propylene rubber by THz imaging were also examined.

本研究的目的是通过测量超宽带频段的介电常数和吸收光谱来了解聚合物薄膜的介电性能。2012财年，为了获得未来超高速宽带通信系统的有用信息，用自由空间法测量了7种聚合物在GHz频率下的介电常数。本研究的要点以参考论文的形式提交。2013财年，利用量子化学计算，对伽马射线辅助氧化产生的交联聚乙烯的吸收光谱进行了实验和数值分析。结果表明，吸收是由于光学不活跃的晶格振动通过氧化诱导的结构变化而变得活跃而引起的共振振动。此外，还探讨了用太赫兹成像检测乙丙橡胶降解的可能性。

项目成果

わが国電力産業および関連分野におけるテラヘルツ波利用材料評価技術の現状

日本电力行业及相关领域太赫兹波材料评价技术现状

• 发表时间: 2013
• 期刊: 化学工業
• 作者: Y. Kinoshita;Y. Tojo;R. Matsumura;T. Sadoh;T. Nishimura;and M. Miyao;大木義路
• 通讯作者: 大木義路

Measurements of THz absorption peaks in photo-degraded polyethylene and their assignment by quantum chemical calculations

• DOI: 10.1109/ceidp.2013.6747437
• 发表时间: 2013-12
• 期刊: 2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena
• 作者: M. Hosobuchi;M. Komatsu;X. Xie;Y. Cheng;Y. Furukawa;Y. Ohki;M. Mizuno;K. Fukunaga

Dielectric Behavior of a Liquid Crystal Polymer

液晶聚合物的介电行为

• 发表时间: 2014
• 作者: Peng Yang;Yoshimichi Ohki
• 通讯作者: Yoshimichi Ohki

Experimental Study on the Dielectric Behavior of a Liquid Crystal Polymer

液晶聚合物介电行为的实验研究

• 发表时间: 2013
• 作者: Masashi Hosobuchi;Marina Komatsu;Xiaojun Xie;Yonghong Cheng;Yukio Furukawa;Yoshimichi Ohki;Maya Mizuno;and Kaori Fukunaga;Peng Yang and Yoshimichi Ohki
• 通讯作者: Peng Yang and Yoshimichi Ohki

テラヘルツ分光とイメージングの放電・絶縁分野への応用

太赫兹光谱和成像在放电和绝缘领域的应用

• 作者: Masashi Hosobuchi;Marina Komatsu;Xiaojun Xie;Yonghong Cheng;Yukio Furukawa;Yoshimichi Ohki;Maya Mizuno;and Kaori Fukunaga;Peng Yang and Yoshimichi Ohki;小松麻理奈，井筒智之，大木義路，水野麻弥，福永香;大木義路;Yoshimichi Ohki;Yoshimichi Ohki;Yoshimichi Ohki;大木義路
• 通讯作者: 大木義路