Electrical properties of epoxy/POSS composites with homogeneous nanostructure

Xingyi Huang, Yong Li, Fei Liu, Pingkai Jiang, Tomonori Iizuka, Kohei Tatsumi, Toshikatsu Tanaka

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

The knowledge of the structure-property relationship at nanoscale level is important to develop advanced dielectric polymer composites. Herein dielectric epoxy/polyhedral oligomeirc silsesquioxanes (POSS) composites with homogeneous nanostructure were prepared. Unlike the conventional inorganic nanoparticles (e.g., silica) used for polymer nanocomposite preparation, the POSS molecules used in this work have three advantages: a comparable size with the segments of polymer chains, being capable of reacting with the base polymer, good solubility in many solvents. These three advantages make the POSS be dispersed in polymers at a molecular level and thus their nano-effect could be fully utilized. Microstructure analysis by transmission electron microscopy, atomic force microscopy and X-ray diffraction confirmed the molecular-level dispersion of POSS in the epoxy composites. On this base, the partial discharge erosion resistance, frequency/temperature dependence of dielectric response, space charge distribution and breakdown strength of the epoxy/POSS composites were investigated. Moreover, the correlation between the nanostructure and properties of epoxy/POSS composites was documented.

Original languageEnglish
Article number6877978
Pages (from-to)1516-1528
Number of pages13
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Volume21
Issue number4
DOIs
Publication statusPublished - 2014 Aug

Keywords

  • Nanocomposites
  • POSS
  • activation energy
  • breakdown strength
  • dielectric constant
  • electrical conductivity
  • epoxy resin
  • nanostructure
  • space charge distribution

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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