Abstract
To study the variation of surface characteristics of glass fiber reinforced epoxy composite insulation materials during the development of tracking, this paper established an experimental platform for tracking under the inclined plate method and prepared samples of glass fiber reinforced epoxy resin. In this paper, according to the experimental discharge phenomenon, discharge repetition rate phase diagram and corrosion degree of materials, the process of tracking was divided into four stages: initiation, stability, development and outbreak stages. Scanning electron microscope was used to observe the change of micromorphology of samples in different stages of tracking. The content of elements in different stages of tracking was determined by energy dispersive spectrometer. The surface characteristic functional groups in different stages of tracking were measured by Fourier transform infrared spectroscopy. The results show that with the change of surface morphology and the formation of surface products during tracking, the content of C element in the spherical region of the material decreased first and then increased, and the content of O and Si increased first and then decreased. The epoxy group of the material was gradually decomposed. Carbonyl group was generated on the surface of the material, and then decomposed during the outbreak stages. In addition, the deterioration mechanism of thermal aging and tracking was quite different. Thermal aging provided convenient routes for the electron injection into the material during tracking, thus reducing the tracking and erosion resistance of the material.
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Wang, Y., Feng, C., Luo, Y. et al. Study on Surface Characteristics of E-glass Fiber Reinforced Epoxy Resin Composites in Different Stages of Tracking. Fibers Polym 21, 2556–2568 (2020). https://doi.org/10.1007/s12221-020-1265-y
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DOI: https://doi.org/10.1007/s12221-020-1265-y