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首页> 外文会议>誘電?絶縁材料研究会 >Trap Energies and ac Breakdown Properties of Epoxy Resin Filled with Nanosilica Modified by Hyperbranched-polyester
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Trap Energies and ac Breakdown Properties of Epoxy Resin Filled with Nanosilica Modified by Hyperbranched-polyester

机译：超支化聚酯改性纳米二氧化硅填充环氧树脂的陷阱能和交流击穿特性

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Spherically-shaped nano-sized silica fillers with the average diameter of 30 nm were surface-treated with hyperbranched polyester with 12 terminal carboxyl radicals, and they were added to bisphenol-A epoxy resin with various contents from 1 to 7 wt%. Analyses by thermally stimulated depolarization current indicate that, the activation energy of modified epoxy resin can reach the range from 0.86 to 1.15 eV. The ac breakdown field of modified EP is 39.8 kV/mm, which is 1.32 times that of pristine epoxy resin and 1.17 times that of epoxy resin treated by silane coupling agent. Besides the deep traps, the enhanced bonding strength between carboxyl radicals and active groups in epoxy resin is also responsible for the improved dielectric behavior.
机译：用具有12个末端羧基的超支化聚酯对平均直径为30nm的球形纳米级二氧化硅填料进行表面处理，然后将它们加入到具有1至7重量％的各种含量的双酚A环氧树脂中。通过热激发的去极化电流分析表明，改性环氧树脂的活化能可以达到0.86〜1.15eV。改性EP的交流击穿场为39.8 kV / mm，是原始环氧树脂的1.32倍，是硅烷偶联剂处理的环氧树脂的1.17倍。除了深陷阱以外，环氧树脂中羧基与活性基团之间增强的键合强度还有助于改善介电性能。

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