Abstract
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.
| Original language | English |
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| Title of host publication | Proceedings of 2017 International Symposium on Electrical Insulating Materials, ISEIM 2017 |
| Publisher | Institute of Electrical Engineers of Japan |
| Pages | 539-542 |
| Number of pages | 4 |
| Volume | 2 |
| ISBN (Electronic) | 9784886860996 |
| DOIs | |
| Publication status | Published - 2017 Dec 4 |
| Event | 2017 International Symposium on Electrical Insulating Materials, ISEIM 2017 - Toyohashi, Japan Duration: 2017 Sep 11 → 2017 Sep 15 |
Other
| Other | 2017 International Symposium on Electrical Insulating Materials, ISEIM 2017 |
|---|---|
| Country | Japan |
| City | Toyohashi |
| Period | 17/9/11 → 17/9/15 |
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Keywords
- Crystalline polymer
- Crystallinity
- Infrared absorption spectroscopy
- Non-destructive diagnosis
- Terahertz time-domain spectroscopy
- X-ray diffraction
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials