X-Ray Photoelectron Spectroscopy and Raman Spectroscopy Studies of the Gamma-Irradiated Ethylene–Tetrafluoroethylene Copolymer

• Published in: High energy chemistry Vol. 58; no. 2; pp. 230 - 235
• Main Authors: Tashmetov, M. Yu, Ismatov, N. B., Demidov, S. V., Allayarov, S. R.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.04.2024; Springer Nature B.V
• Subjects: Carbon content; Carbonization; Chemical composition; Chemistry; Chemistry and Materials Science; Copolymers; Ethylene; Fluorine; Oxidation; Oxygen atoms; Photoelectrons; Physical Chemistry; Radiation; Radiation Chemistry; Radiation dosage; Radiation effects; Raman spectra; Raman spectroscopy; Spectroscopic analysis; Spectrum analysis; X ray photoelectron spectroscopy; ethylene–tetrafluoroethylene copolymer; Raman spectroscopy; chemical composition; X-ray photoelectron spectroscopy; γ-irradiation
• ISSN: 0018-1439; 1608-3148
• DOI: 10.1134/S0018143924020139

The chemical composition of the surface of a γ-irradiated ethylene–tetrafluoroethylene copolymer has been studied by XPS. The survey XPS spectrum of the initial and radiolyzed copolymer exhibits peaks attributed to fluorine, carbon, and oxygen atoms. Analysis of C 1 s photoelectrons has shown that the relative intensity of the peak characteristic of the –CF 2 group decreases in the irradiated copolymer. The fact that the amount of the CF 2 group decreases during radiolysis has been also confirmed by a decrease in the intensity of the peak in the F 1 s spectrum after irradiation. It has been shown that the carbon content in the irradiated copolymer increases; this finding suggests that the copolymer surface undergoes radiation-induced carbonization. The O 1s spectrum exhibits an intense peak characteristic of groups containing a C–O bond. An increase in the peak intensity with the radiation dose suggests that the copolymer surface undergoes significant radiation-induced oxidation to form oxygen-containing groups. The appearance of signals of the C=O and C=C bonds in the Raman spectra also indicates the radiation-induced oxidation and carbonization of the irradiated copolymer chain.