Terahertz spectroscopic analysis of ethylene-propylene-diene copolymer

Marina Komatsu, Tomoyuki Izutsu, Yoshimichi Ohki, Maya Mizuno, Kaori Fukunaga, Yoshiaki Nakamura, Naofumi Chiwata

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

6 Citations (Scopus)


Inorganic fillers are very often added to ethylene-propylene-diene copolymer (EPDM), which is a typical rubber material used for electrical insulation, for the purpose of improving its various properties. Regarding this, although the content and dispersion of inorganic fillers exert a significant influence on the properties of EPDM, detailed research has been done scarcely. In the present research, talc and magnesium hydroxide were added to EPDM, and detection of the content and dispersion of fillers was tried by terahertz absorption spectroscopy. As a result, it has become clear that the content of talc can be estimated by the increase in absorption at 3.05 THz. The possibility of estimating the talc content from incremental values of three absorptions in a far-infrared range has also been confirmed, in addition to the 3.05-THz absorption. Furthermore, the dispersion of magnesium hydroxide fillers is likely to correspond to the scattering of absorption spectra at around 1.0 to 1.5 THz.

Original languageEnglish
Title of host publicationProceedings of 2014 International Symposium on Electrical Insulating Materials, ISEIM 2014
PublisherInstitute of Electrical Engineers of Japan
Number of pages4
ISBN (Print)9784886860866
Publication statusPublished - 2014 Jan 1
Event2014 International Symposium on Electrical Insulating Materials, ISEIM 2014 - Niigata, Japan
Duration: 2014 Jun 12014 Jun 5

Publication series

NameProceedings of the International Symposium on Electrical Insulating Materials


Other2014 International Symposium on Electrical Insulating Materials, ISEIM 2014


  • Terahertz spectroscopy
  • cable insulating material
  • ethylene-propylene-diene copolymer
  • magnesium hydroxide
  • talc

ASJC Scopus subject areas

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


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