Evaluation of dielectric properties in polypropylene/clay nanocomposites

N. Fuse, T. Tanaka, Y. Ohki

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

9 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationCEIDP - 2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena
Pages507-510
Number of pages4
DOIs
Publication statusPublished - 2009 Dec 1
Event2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Virginia Beach, VA, United States
Duration: 2009 Oct 182009 Oct 21

Publication series

NameAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
ISSN (Print)0084-9162

Conference

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

ASJC Scopus subject areas

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

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  • Cite this

    Fuse, N., Tanaka, T., & Ohki, Y. (2009). Evaluation of dielectric properties in polypropylene/clay nanocomposites. In CEIDP - 2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (pp. 507-510). [5377891] (Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP). https://doi.org/10.1109/CEIDP.2009.5377891