Dielectric relaxation of fullerene C60-containing nanocomposites based on poly(phenylene oxide)

Natalia A. Nikonorova, Galina A. Polotskaya, Alexey A. Kononov, Brian R. Hinderliter, Kirill L. Levine, Rene A. Castro

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Molecular mobility of nanocomposites based on poly(phenylene oxide) (PPO) containing 1, 2, 4 and 8 wt% of C60 fullerenes was studied by dielectric spectroscopy. In all samples, two relaxation processes were present and caused by polarization of the single polar –O– group located between phenyl rings. This polarization includes two stages with the first stage (occurring in the glassy state) is caused by rotation of phenyl rings and the adjacent polar –O– groups by small angles that results in the local β process. The second stage (occurring at temperatures exceeding the glass transition temperature Tg) involves segmental mobility and leads to emergence of the α process. Molecular mobility in the region of the β process varies slightly with C60 concentration. In the case of the α process, molecular mobility changes non-monotonically with increasing fullerene concentration.

Original languageEnglish (US)
Pages (from-to)99-105
Number of pages7
JournalJournal of Non-Crystalline Solids
Volume483
DOIs
StatePublished - Mar 1 2018

Keywords

  • Dielectric relaxation
  • Fullerene C
  • Glass transition temperature
  • Molecular mobility
  • Nanocomposites
  • Poly(phenylene oxide)

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