Broadband terahertz time-domain spectroscopic study on form II polyvinylidene fluoride

Tatsuya Mori, Hikaru Igawa, Daichi Okada, Yohei Yamamoto, Kei Iwamoto, Naoki Toyota, Seiji Kojima

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The complex dielectric constant of semicrystalline form II polyvinylidene fluoride (PVDF (II)) in the frequency range from 0.2 to 6.0 THz has been determined by broadband terahertz time-domain spectroscopy (THz-TDS). The obtained dielectric constant consists of superposition of four vibration modes at 1.60, 2.36, 3.04 and 5.31 THz of crystalline part and a broad relaxation mode with center frequency of 0.68 THz which will be attributed to boson peak of amorphous fraction. In addition, the temperature dependence of the dielectric constant has also been measured, and we have determined the glass transition temperature of amorphous fraction of PVDF (II) as about 192 K by analysis of the temperature variation of peak frequency of the lattice vibration mode.

Original languageEnglish
Pages (from-to)93-97
Number of pages5
JournalJournal of Molecular Structure
Volume1090
DOIs
Publication statusPublished - 2015 Jun 15

Keywords

  • Boson peak
  • Broadband terahertz time-domain spectroscopy
  • Glass transition
  • PVDF

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Inorganic Chemistry

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