Measurements of THz absorption peaks in photo-degraded polyethylene and their assignment by quantum chemical calculations

M. Hosobuchi, M. Komatsu, X. Xie, Y. Cheng, Y. Furukawa, Y. Ohki, M. Mizuno, K. Fukunaga

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Electrical insulation properties of low density polyethylene (LDPE) are still unclear, especially when it is degraded. In this regard, ultraviolet (UV) photons were irradiated to LDPE sheets at room temperature and 85°C and their absorption spectra were measured at frequencies from 0.5 to 3.0 THz and from 18 to 105 THz. A very broad absorption band with its peak at around 1.6 THz appears by the UV irradiation. In accord with this appearance, the infrared absorption peak due to a carbonyl structure increases. Quantum chemical calculations were carried out using 3-dimensional models with and without carbonyl groups. As a result, the model with carbonyl groups was found to have optically active modes at about 1.7 THz. From these results, the increase in absorption at 1.6 THz is assumed to be induced by oxidation.

Original languageEnglish
Title of host publication2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2013
Pages1046-1049
Number of pages4
DOIs
Publication statusPublished - 2013 Dec 1
Event2013 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2013 - Shenzhen, China
Duration: 2013 Oct 202013 Oct 23

Publication series

NameAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
ISSN (Print)0084-9162

Conference

Conference2013 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2013
CountryChina
CityShenzhen
Period13/10/2013/10/23

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Hosobuchi, M., Komatsu, M., Xie, X., Cheng, Y., Furukawa, Y., Ohki, Y., Mizuno, M., & Fukunaga, K. (2013). Measurements of THz absorption peaks in photo-degraded polyethylene and their assignment by quantum chemical calculations. In 2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2013 (pp. 1046-1049). [6747437] (Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP). https://doi.org/10.1109/CEIDP.2013.6747437