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 language | English (US) |
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Pages (from-to) | 99-105 |
Number of pages | 7 |
Journal | Journal of Non-Crystalline Solids |
Volume | 483 |
DOIs | |
State | Published - Mar 1 2018 |
Bibliographical note
Funding Information:This research was financially supported by Ministry of Education and Science of the Russian Federation (grant №. 3.5005.2017/ВУ )
Publisher Copyright:
© 2018 Elsevier B.V.
Keywords
- Dielectric relaxation
- Fullerene C
- Glass transition temperature
- Molecular mobility
- Nanocomposites
- Poly(phenylene oxide)