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• W4288045289 endingPage "153948" @default.
• W4288045289 startingPage "153948" @default.
• W4288045289 abstract "As a special engineering material, poly(ether-ether-ketone) (PEEK) is widely used in various safety facilities of nuclear power plants and is susceptible to the long-term cumulative effects of many complex factors. Among them, heat and irradiation are two key accompanying factors that accelerate the degradation of PEEK materials. Long-term exposure to heat and irradiation can lead to cracking, cross-linking, and oxidation reactions of PEEK materials, impairing material properties, reducing device and operational reliability, and even shortening service life. Therefore, it is very important to study its thermal-radiation aging law for its material service optimization. In this study, PEEK sheets with different tensile orientations were irradiated by a cobalt-60 irradiation source in an air atmosphere at 70 °C, and the effect of thermal-radiation on the properties of PEEK sheets was studied. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and universal tensile machine were used to investigate the effect of absorbed dose on the crystalline properties, thermal stability, mechanical properties and surface morphology of oriented PEEK sheets in the direction of force (horizontal direction) and perpendicular to the direction of force (vertical direction). Results showed that the physicochemical properties of the oriented PEEK sheets were changed under the synergistic effect of temperature, air, and irradiation. Within the absorbed dose range, with the increase of absorbed dose from 0-2500 kGy, the crystallinity of the sample first increased and then decreased. Due to the predominance of chain scission in the aging process, the crystallization temperature and melting temperature of the sample increased, while the thermal stability decreased. Elongation at break and tensile strength decrease with increasing absorbed dose." @default.
• W4288045289 created "2022-07-27" @default.
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• W4288045289 date "2022-11-01" @default.
• W4288045289 modified "2023-10-16" @default.
• W4288045289 title "Thermal-radiation aging on oriented poly(ether-ether-ketone) sheets" @default.
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• W4288045289 doi "https://doi.org/10.1016/j.jnucmat.2022.153948" @default.
• W4288045289 hasPublicationYear "2022" @default.
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