Action of space charge on aging and breakdown of polymers |
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Authors: | Jixiao Li Yewen Zhang Zhongfu Xia Xiaoqiu Qin Zongren Peng |
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Institution: | (1) Pohl Institute of the Solid State Physics, Tongji University, 200092 Shanghai, China;(2) State Key Laboratory of Electrical Insulation for Power Equipment, Xi’an University, 710049 Xi’an, China |
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Abstract: | The study on how space charges affect aging and breakdown of polymers becomes one of the most important domains. Most of the
models are based on the injected charges increasing the local field to induce the breakdown of polymers and breaking the large
molecule chains. These models ignore the effects of space charge on the microstructure of dielectric materials. In this review,
with the calculation of the electromagnetic energy and the electromechanical energy around a trapped charge and with some
new experimental results, it is proved that aging and breakdown in polymers are caused during the detrapping of the trapped
charges. Aging and breakdown of the polymers are related to the release of the electromechanical energy around trapped charges. |
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Keywords: | space charge breakdown polymer |
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