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Electrical properties of TiO2-filled polyimide nanocomposite films prepared via an in situ polymerization process

Zha, Junwei, Dang, Zhimin, Zhao, Tao, Song, Hongtao and Chen, George (2010) Electrical properties of TiO2-filled polyimide nanocomposite films prepared via an in situ polymerization process Synth. Metals, 160, pp. 2670-2674.

Record type: Article


To fully understand the reliable electrical properties of the nanocomposite films, their physical and chemical behaviors as well as dielectric properties were analyzed. Polyimide/TiO2 (PI/TiO2) nanocomposite films were prepared using in situ dispersion polymerization process. Influences of frequency, temperature and the nano-TiO2 particles loading concentration on dielectric permittivities of the PI/TiO2 nanocomposite films were studied. The dielectric relaxation behavior of the PI/TiO2 nanocomposite films has been investigated with dielectric relaxation spectrum. It was found that interfacial polarization, namely Maxwell–Wagner–Sillars, existed in the PI/TiO2 nanocomposite films with different loading concentration of the nano-TiO2 particles. Dielectric permittivities of the PI/TiO2 nanocomposite films fluctuation with temperature (?50–150 ?C) were attributed to the mobility and thermal expansion of the polymer matrix, for which the Cole–Davidson model, or modified Cole–Cole model, was brought to account.

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Published date: December 2010
Organisations: Electronics & Computer Science, EEE


Local EPrints ID: 272052
ISSN: 0379-6779
PURE UUID: 90fb2843-79e4-49d7-8c48-9f9edc128936

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Date deposited: 22 Feb 2011 10:29
Last modified: 18 Jul 2017 06:35

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Author: Junwei Zha
Author: Zhimin Dang
Author: Tao Zhao
Author: Hongtao Song
Author: George Chen

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