We added nanofillers of MgO, Mg(OH)₂, SiO₂, and TiO₂ to epoxy resin by high‐pressure shearing at a content of 1 vol%. The glass transition temperature (T_g), dielectric properties, and mechanical properties were measured for these nanocomposites. As a result, T_g decreases in all the nanocomposites. When the filler is MgO or Mg(OH)₂, the increase of the real part (ϵ_r′) and that of the imaginary part (ϵ_r″) of complex permittivity are significantly suppressed at high temperatures by the filler loading. On the other hand, when the filler is SiO₂ and TiO₂, the suppression of the increase in ϵ_r′ and ϵ_r″ is not obvious. Furthermore, regardless of the filler material, the addition of nanofiller hardly affects the mechanical storage modulus at 200°C. These results indicate that the difference in filler material gives more significant effects on dielectric properties than on mechanical properties. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

---

环氧树脂纳米复合材料的热，介电和机械性能的填料依赖性变化

我们通过高压剪切以1 vol％的含量向环氧树脂中添加了MgO，Mg（OH）₂，SiO ₂和TiO ₂纳米填料。测量了这些纳米复合材料的玻璃化转变温度（T _g），介电性能和机械性能。结果，在所有纳米复合材料中T _g降低。当填充剂为MgO或Mg（OH）_2时，由于填充剂的添加，在高温下显着抑制了复介电常数的实部（ϵ _r '）和虚部（ϵ _r ″）的增加。另一方面，当填料是SiO ₂和TiO时_{如图2所示}，对ϵ _r '和ϵ _r ''的增加的抑制不明显。此外，无论填充材料如何，添加纳米填充剂几乎不会影响200℃下的机械储能模量。这些结果表明，填充材料的差异对介电性能的影响远大于对机械性能的影响。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。