Preliminary study on infrared spectral characteristics of mineral oil impregnated polymer materials under electro-thermal aging

Material´s micromechanism determines its property, therefore we should research on polymer material´s micromechanism so as to further explain its insulation characteristic. From material´s infrared spectrum, main function groups can be found through the wave numbers of absorption peaks. In the experiment five kinds of polymer materials, which are kraft paper, PC, PET, PTFE and PPS, are aged in the condition of high temperature and high electric intensity. Polymer materials before aging and under aging for one to three months are tested for infrared spectra. The absorption peaks of polymer materials´ infrared spectra respectively reflect their main function groups. From the comparison of infrared spectra of the polymer materials before and after aging, we can find transformation of characteristic function groups of the polymer materials under aging. In this paper the infrared spectral characteristics of mineral oil impregnated polymer materials under electro-thermal aging are preliminarily analyzed.