TY - GEN
T1 - Terahertz absorption spectroscopy of poly(ether ether ketone)
AU - Kaneko, Takuya
AU - Hirai, Naoshi
AU - Ohki, Yoshimichi
N1 - Funding Information:
This research was partly supported by the Nuclear Regulation Authority in Japan through Ageing Management Technical Evaluation Enhancement Program.
Publisher Copyright:
© 2017 Institute of Electrical Engineers of Japan. All rights reserved.
PY - 2017/12/4
Y1 - 2017/12/4
N2 - The crystallinity of sheets of poly(ether ether ketone) (PEEK) was changed by thermal treatments conducted at 295 oC for various periods and their terahertz (THz) and Fouriertransform infrared absorption (FT-IR) spectra were obtained. As a result, it has been confirmed that an absorption peak appears at around 3.5 THz in the sheet samples that exhibit clear X-ray diffraction patterns at 20= 18.8, 20.8, 22.8, and 28.8o. In contrast, no obvious sample-dependent changes were observed in FT-IR spectra. The absorption at around 3.5 THz shows a shift in frequency to a degree proportional to the crystallinity. Its maximum intensity is also in proportion to the crystallinity. These results indicate that the absorption at 3.62 THz has a close relation with the crystallinity of PEEK This in turn means that the THz absorption spectroscopy can be used for estimating the crystallinity of PEEK.
AB - The crystallinity of sheets of poly(ether ether ketone) (PEEK) was changed by thermal treatments conducted at 295 oC for various periods and their terahertz (THz) and Fouriertransform infrared absorption (FT-IR) spectra were obtained. As a result, it has been confirmed that an absorption peak appears at around 3.5 THz in the sheet samples that exhibit clear X-ray diffraction patterns at 20= 18.8, 20.8, 22.8, and 28.8o. In contrast, no obvious sample-dependent changes were observed in FT-IR spectra. The absorption at around 3.5 THz shows a shift in frequency to a degree proportional to the crystallinity. Its maximum intensity is also in proportion to the crystallinity. These results indicate that the absorption at 3.62 THz has a close relation with the crystallinity of PEEK This in turn means that the THz absorption spectroscopy can be used for estimating the crystallinity of PEEK.
KW - Crystalline polymer
KW - Crystallinity
KW - Infrared absorption spectroscopy
KW - Non-destructive diagnosis
KW - Terahertz time-domain spectroscopy
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=85041904991&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85041904991&partnerID=8YFLogxK
U2 - 10.23919/ISEIM.2017.8166545
DO - 10.23919/ISEIM.2017.8166545
M3 - Conference contribution
AN - SCOPUS:85041904991
T3 - Proceedings of the International Symposium on Electrical Insulating Materials
SP - 539
EP - 542
BT - Proceedings of 2017 International Symposium on Electrical Insulating Materials, ISEIM 2017
PB - Institute of Electrical Engineers of Japan
T2 - 2017 International Symposium on Electrical Insulating Materials, ISEIM 2017
Y2 - 11 September 2017 through 15 September 2017
ER -