S. R. Allayarov, et al. High Energy Chemistry, 2020, 54, 285-290.
The chemical composition of the surface of polychlorotrifluoroethylene plates irradiated with γ-rays was studied by X-ray photoelectron spectroscopy (XPS). After γ-ray irradiation, the chemical composition of the surface of polychlorotrifluoroethylene changed significantly, with a decrease in carbon concentration and an increase in fluorine, oxygen and chlorine concentrations.
· The initial PCTFE contained impurities of oxygen and sodium.
· After irradiation, noticeable changes were observed in peak intensities: C1s intensity decreased while F1s, Cl2p, and O1s intensities increased. The increase in O1s intensity was attributed to the oxidation reactions of free radicals on the surface.
· The carbon fraction on the surface significantly decreased, while the concentrations of fluorine, oxygen, and chlorine increased. The [F/C] ratio was significantly higher after irradiation compared to the initial polymer.
· In details, the PCTFE surface containing the elements (at %) C : F : O : Cl : Na = 58.75 : 25.66 : 8.05 : 6.96 : 0.58, the concentration of carbon decreased after γ-irradiation and the concentrations of fluorine, oxygen, and chlorine increased to (at %) C : F : O : Cl : Na = 49.29 : 31.28 : 10.33 : 8.61 : 0.37.
Kuroki, Tomoyuki, et al. IEEE Transactions on Industry Applications, 2014, 51(3), 2497-2503.