Dielectric spectroscopy for biorenewable plant oil-based polyurethane

S. A. Madbouly, M. R. Kessler

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

Abstract

Novel biorenewable castor oil-based polyurethane (PU) thermoset has been prepared via environmentally friendly aqueous dispersion with no organic solvent. Thin film of castor oil-based PU was obtained via solvent casting method of the aqueous dispersion. Dielectric spectroscopy of the PU thin film was investigated at different temperatures and frequencies using dielectric spectrometer from Novocontrol. The dielectric spectra of the castor oil-based PU showed α-, β-, and γ-relaxation processes and ionic conductivity at different temperatures and frequencies. The broadband dielectric spectra of castor oil-based PU was resolved into different relaxation processes based on Havriliak-Negami equation. The VFT equation was used to describe the molecular dynamics of the α-relaxation process. However, on the other hand Arrhenius equation was found to fit the linear activation curves of β- and γ-relaxation processes with apparent activation energies of 68 and 30 kJ/mol, respectively.

Original languageEnglish (US)
Title of host publication2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages788-791
Number of pages4
ISBN (Electronic)9781479975235
DOIs
StatePublished - Dec 22 2014
Event2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2014 - Des Moines, United States
Duration: Oct 19 2014Oct 22 2014

Publication series

Name2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2014

Conference

Conference2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2014
CountryUnited States
CityDes Moines
Period10/19/1410/22/14

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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