Broadband terahertz spectroscopy of polypropylenes with different tacticities

S. Ariyoshi, Nobuya Hiroshiba, Y. Tanzawa, Y. Ichikawa, J. Bae

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We apply Fourier transform terahertz spectroscopy to an investigation of polypropylenes (PPs) with different tacticities. Terahertz (THz) absorption spectra were measured for isotactic, syndiotactic, and atactic samples over a frequency range of 1-11 THz. A clear difference in the spectra of the isotactic and syndiotactic PPs was observed, while that of the atactic PP did not display any clear characteristic absorption peaks. The spectral differences are thought to originate from not only the primary structure but also intermolecular vibrations of the well-packed PP-chains in the crystal structure. Broadband THz spectroscopy offers a nondestructive, noninvasive inspection technique for generalpurpose plastics.

Original languageEnglish
Article number045303
JournalMaterials Research Express
Issue number4
Publication statusPublished - 2015 Dec 1
Externally publishedYes


  • Polymer science
  • Polypropylenes
  • Terahertz spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Metals and Alloys


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