超支化聚酯改性纳米SiO<sub>2</sub>/环氧树脂的电树枝生长特性

doi:10.19595/j.cnki.1000-6753.tces.191133

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Abstract In order to study the influence of Hyperbranched Polyester interface modification on the growth characteristics of electrical tree for nano-SiO₂/EP, the nanocomposites filled with different content were prepared by chemical grafting and plasma assisted grafting. Then, the partial discharge and electrical tree development experiments were investigated by a needle-plate electrode system. Experimental results show that deep traps of 0.99~1.53eV are observed in the nanocomposites modified by plasma-assisted grafting. The partial discharge inception voltage reaches a peak value of 14.5kV at 3% filling content, which is 55.9% higher than that of pure EP. And the electrical tree resistance is optimal at 5% filling content. Moreover, the complexity of electrical tree is higher at the same filling content. This paper indicates that plasma-assisted grafting enhances the bond strength of the nanocomposites interface and introduces deep traps in the interface area, which in turn improves the electrical tree resistance of nano-SiO₂/EP.

Key words： Hyperbranched polyester low-temperature plasma epoxy resin surface modification electrical tree

Received: 02 September 2019

PACS:

TM215.92

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	Yang Guoqing
	Liu Geng
	Wang Deyi
	Wang Chuang
	Li Jiaxin

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Yang Guoqing,Liu Geng,Wang Deyi等. Growth Characteristics of Electric Tree for Nano-SiO₂/Epoxy Resin Modified by Hyperbranched Polyester[J]. Transactions of China Electrotechnical Society, 2020, 35(20): 4415-4422.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191133 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I20/4415

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