A new method for estimating the content of vinyl acetate in ethylene-vinyl acetate copolymer

Tomoyuki Izutsu, Daisuke Odaka, Marina Komatsu, Yoshimichi Ohki, Maya Mizuno, Yoshiaki Nakamura, Naofumi Chiwata

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A new method for estimating the content of vinyl acetate (VA) in ethylene-vinyl acetate copolymer (EVA) is proposed. It is a kind of optical absorption spectroscopy in a frequency range from 0.5 to 21.0 THz. Comparison of absorption spectra among sheets of EVA with differing contents of VA from 12 to 60% by weight and a sheet of low-density polyethylene containing no VA revealed that the EVA sheets exhibit relatively sharp absorption at 2.5, 6.7, and 10.5 THz and rather broad absorption at 11 to 17 THz and 17 to 20 THz. All these absorption intensities are in proportion to the content of VA, up to certain contents, which enables us to estimate the content of VA in EVA quantitatively. Among them, the absorption at 2.5 THz measured by THz time-domain spectroscopy shows the best accuracy.

Original languageEnglish
Article number7534602
Pages (from-to)1260-1265
Number of pages6
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Volume23
Issue number3
DOIs
Publication statusPublished - 2016 Jun

Keywords

  • Dielectric materials
  • ISO
  • infrared spectroscopy
  • optical spectroscopy

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'A new method for estimating the content of vinyl acetate in ethylene-vinyl acetate copolymer'. Together they form a unique fingerprint.

Cite this