Numata, T.; Ishikawa, N.; Shimada, T.; Gordon, K. C.; Yamaguchi, M. Low Frequency Raman Spectroscopy on Amorphous Poly(Ether Ether Ketone) (PEEK). Preprints2024, 2024060875. https://doi.org/10.20944/preprints202406.0875.v1
APA Style
Numata, T., Ishikawa, N., Shimada, T., Gordon, K. C., & Yamaguchi, M. (2024). Low Frequency Raman Spectroscopy on Amorphous Poly(Ether Ether Ketone) (PEEK). Preprints. https://doi.org/10.20944/preprints202406.0875.v1
Chicago/Turabian Style
Numata, T., Keith C Gordon and Makoto Yamaguchi. 2024 "Low Frequency Raman Spectroscopy on Amorphous Poly(Ether Ether Ketone) (PEEK)" Preprints. https://doi.org/10.20944/preprints202406.0875.v1
Abstract
Low-frequency peaks in the Raman spectra of amorphous poly (ether ketone) (PEEK) are investigated. An amorphous sample with zero crystallinity, as confirmed by WAXRD, was used in this study. In a previous study, two peaks were observed in the low-frequency Raman spectra of crystallized samples. One of the peaks at 135 cm-1, disappeared for the amorphous sample. Furthermore, the peak at 50 cm-1 was observed for the first time in the crystallized sample. The peak at 50 cm-1, similar to the peak at 135 cm-1, disappeared in the amorphous state, and its intensity increased with increasing crystallinity. The origins of the two peaks were both associated with the Ph-CO-Ph-type intermolecular vibrational modes in the simulation. It was suggested that the Ph-CO-Ph vibrational mode observed in the low-frequency region of PEEK was strongly in-fluenced by the intermolecular order.
Chemistry and Materials Science, Polymers and Plastics
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