Polarized terahertz spectroscopy for evaluation of deformed polyethylene

Kenta Watanabe, Tadao Tanabe, Yutaka Oyama, Koichi Seo

Research output: Contribution to journalArticle

Abstract

Polarized terahertz (THz) wave spectra were obtained applied for the evaluation of polymer chains in mechanically extensional-deformed ultrahigh-molecular-weight-polyethylenes (UHMWPEs). THz absorption band was seen around 2.2 THz which is due to the B1u translational lattice vibration. For the deformed UHMWPE, the dichroism is appeared in the 2.2 THz band intensity. The absorption intensity is smaller in spectra with the THz wave electric polarization direction parallel to the deformation direction than that with the polarization direction perpendicular. The ratio of absorption intensity in each polarization directions is dependent on the amount of elongation strain. Based on the THz and XRD results, it is suggested that the THz nondestructive diagnosis of the tensile strain in deformed UHMWPE is possible based on the dichroism of B1u band intensities on polarized THz wave spectroscopy.

Original languageEnglish
Pages (from-to)149-152
Number of pages4
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume74
Issue number3
DOIs
Publication statusPublished - 2010 Mar
Externally publishedYes

Keywords

  • Mechanical property
  • Molecular vibration
  • Nondestructive inspection
  • Polymer material
  • Terahertz spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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