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THE EFFECT OF GAMMA IRRADIATION ON THE OPTICAL PROPERTIES OF COMPOSITE MATERIAL "POLYIMIDE - YBCO-
Abstract
To date, the study of the action of ionizing radiation on the structure and properties of polymers, as well as on their basis of composite materials remains an urgent task. Studies of the impact of different types of radiation on polymeric materials, primarily due to the practical interest due to the need to solve the problems of improving the reliability of devices and devices operating in the field of radiation, as well as the prospects of radiation technologies to provide targeted modification of the properties of materials. The aim of this work was to study the changes in the optical spectral characteristics as a result of gamma irradiation on the electron-structural state of the films of the system "Polyimide- YBa2Cu3O6,7 ". The effect of radiation exposure on the optical properties of a polyimide (PI) film and polymer compositions with fillers from high-temperature superconductors (YBa2Cu3O6,7 (YBCO)) was studied. Samples of polyimide composite materials (PCM) were made in the form of films with different concentrations (C) of filler: C = 0.05 mass%. thickness (d) = 75 ?m, S = 0,1 mass%. d = 85 ?m, C = 0.5 mass%, d = 82 ?m. A film of pure polyimide d = 40 ?m thick was taken as a control sample. It was found that irradiation of polyimide films with irradiation at doses of 250 and 600 kGy creates in the transmission coefficient spectrum signs of a weakly expressed fine structure in the range of 220-300 nm, which are caused by an increase in their oxygen content, as well as the creation of diene structures.
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