Evaluation of dielectric properties in polypropylene/clay nanocomposites

N. Fuse*, T. Tanaka, Y. Ohki

*この研究の対応する著者

研究成果: Conference contribution

10 被引用数 (Scopus)

抄録

Effects of nanofiller addition on four typical dielectric properties, namely permittivity εr′, dielectric loss factor εr″, space charge accumulation, and partial discharge (PD) resistance were evaluated for polypropylene (PP) and its nanocomposites (NCs) with nanoclay. While εr′ and εr″ are almost independent of temperature and frequency in the base unfilled PP, they are highly dependent on the two parameters in the two NCs. Namely, εr′ increases significantly at temperatures above 20°C and the frequency spectrum of εr″; shows at least one temperature-dependent peak. Furthermore, space charge appears abundantly in the two NCs compared to the base PP. These results indicate that plenty of mobile carriers and/or dipoles, probably resulted from the manufacturing process, remain in the two NCs. Notwithstanding the above-mentioned 'inferior' insulating properties, the two NCs have an improved PD resistance compared with the base PP. Namely, the erosion depth on the surface induced by PDs is the smallest in the NC with the largest filler content, while it is the largest in the base PP. Such differences in the effects of nanofillers on different insulating properties are attributable to the fact that nanofillers can improve the PD resistance simply by their presence, while the chemicals needed for uniform dispersion of nanofillers may sometimes increase the permittivity and abundance of charge carriers.

本文言語English
ホスト出版物のタイトルCEIDP - 2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena
ページ507-510
ページ数4
DOI
出版ステータスPublished - 2009 12月 1
イベント2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Virginia Beach, VA, United States
継続期間: 2009 10月 182009 10月 21

出版物シリーズ

名前Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
ISSN(印刷版)0084-9162

Conference

Conference2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
国/地域United States
CityVirginia Beach, VA
Period09/10/1809/10/21

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 電子工学および電気工学

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