Identification of antioxidants in polymeric insulating materials by terahertz absorption spectroscopy

Takuya Kozai*, Takuya Kaneko, Naoshi Hirai, Yoshimichi Ohki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


For the purpose of using organic polymeric materials for electrical insulation, various additives such as antioxidants are added to prevent degradation or oxidative decomposition of the polymers. Therefore, it is desirable that we can identify antioxidants added in polymers by instrument analyses. In this research, terahertz absorption spectroscopy was conducted for nine kinds of antioxidants. The spectroscopy was also conducted for sheets of low-density polyethylene, to which each antioxidant had been added with different contents. As a result, it has become clear that each antioxidant has its own specific spectrum. In addition, for most antioxidants, the absorption intensity is proportional to the content of antioxidant added in LDPE. However, several absorption peaks change their spectral shapes when the antioxidant is in LDPE.

Original languageEnglish
Pages (from-to)284-290
Number of pages7
JournalPolymer Degradation and Stability
Publication statusPublished - 2018 Jan


  • Antioxidant
  • Insulating polymer
  • Polyethylene
  • Radical scavenger
  • Spectroscopy
  • Terahertz wave

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Polymers and Plastics
  • Materials Chemistry


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