Trap Energies and ac Breakdown Properties of Epoxy Resin Filled with Nanosilica Modified by Hyperbranched-polyester

カテゴリ: 研究会(論文単位)

論文No: DEI17096

グループ名: 【A】基礎・材料・共通部門 誘電・絶縁材料研究会

発行日: 2017/12/19

タイトル(英語): Trap Energies and ac Breakdown Properties of Epoxy Resin Filled with Nanosilica Modified by Hyperbranched-polyester

著者名: Yang Guo-Qing(Waseda University / Xi'an University of Technology),Li Yang(Xi'an University of Technology),Wang De-Yi(Xi'an University of Technology),Ohki Yoshimichi(Waseda University)

著者名(英語): Guo-Qing Yang(Waseda University / Xi'an University of Technology),Yang Li(Xi'an University of Technology),De-Yi Wang(Xi'an University of Technology),Yoshimichi Ohki(Waseda University)

キーワード: epoxy resin|nanosilica|hyperbranched polyester|trap|breakdown|epoxy resin|nanosilica|hyperbranched polyester|trap|breakdown

要約(日本語): 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.

要約(英語): 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.

原稿種別: 英語

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