Crystallinity of poly(ethylene naphthalate) and its relation to terahertz absorption

Daisuke Odaka, Yoshimichi Ohki, Maya Mizuno

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The crystallinity of poly(ethylene naphthalate) (PEN) was changed by thermal annealing and its effects on terahertz absorption spectra and X-ray diffraction patterns were examined. As a result, the intensity of a relatively sharp absorption peak at around 2.2 THz was found to be proportional to the crystallinity. As a plausible cause of this absorption, a lattice vibration, a torsional vibration, or their combination mode associated with (010) planes in crystal α of PEN is proposed. Therefore, the crystallinity of PEN can be estimated from the intensity of this absorption.

Original languageEnglish
Article number032402
JournalJapanese journal of applied physics
Issue number3
Publication statusPublished - 2017 Mar

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


Dive into the research topics of 'Crystallinity of poly(ethylene naphthalate) and its relation to terahertz absorption'. Together they form a unique fingerprint.

Cite this