Experimental study on the dielectric properties of a liquid crystal polymer

Peng Yang, Yoshimichi Ohki

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

Abstract

Dielectric behavior of a typical liquid crystal polymer Vecstar was studied by measuring its dielectric permittivity, conductivity and other electrical properties. Dielectric spectra are analyzed combined with the thermal properties and thermally stimulated current spectra, and space charge distributions. Complex electrical modulus is introduced in the analysis of the permittivity spectra, which proves to be effective to suppress the effects of large conduction currents at high temperatures. Moreover, the slope of the frequency dependence of εr' is different below and above 160 oC, which indicates that the Maxwell/Wagner polarization occurs inside the sample. The experimental results indicate that both the dielectric relaxation and electrical conduction are closely related with molecular motion and phase transition of the polymer. It is also shown that the polymer is an excellent insulating material in a wide temperature and frequency range.

Original languageEnglish
Title of host publication2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2013
Pages575-578
Number of pages4
DOIs
Publication statusPublished - 2013 Dec 1
Event2013 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2013 - Shenzhen, China
Duration: 2013 Oct 202013 Oct 23

Publication series

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

Conference

Conference2013 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2013
CountryChina
CityShenzhen
Period13/10/2013/10/23

ASJC Scopus subject areas

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

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  • Cite this

    Yang, P., & Ohki, Y. (2013). Experimental study on the dielectric properties of a liquid crystal polymer. In 2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2013 (pp. 575-578). [6748209] (Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP). https://doi.org/10.1109/CEIDP.2013.6748209