Аннотация
The effect of the absorbed dose of 40 MGy of electron irradiation and uniaxial tension to rupture at room temperature on the Instron 5982 test breaking machine on changes in the structure of polyimide film macromolecules is studied. Irradiation was carried out on an electronic linear accelerator ELA-6, at room temperature, and the structure change was studied using the Nicolet 5700 IR spectrometer in the range of 4000-400 cm–1, the ESP 300 E spectrometer from Bruker at a wavelength of 3.2 cm, and uniaxial stretching to rupture at room temperature on the Instron 5982 test breaking machine. The aim of this work was to study changes in the structure of macromolecules of polyimide films as a result of electron irradiation and mechanical loading. It was found that after irradiation, the intensity of the IR spectrum increases by ~2-6 times and the width of the bands increases, indicating an increase in the content of radicals. Irradiation of the film with subsequent mechanical loading causes a shift in the EPR line of the spectrum from 3475.0 cm–1 to 3512.5 cm–1 with a simultaneous decrease in the signal amplitude from 6∙103 to 4∙103, indicating a decrease in the concentration of radicals = N-H, -N-H2 groups until their complete disappearance and the formation of new ones caused by electron irradiation