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

Electrical properties of TiO2-filled polyimide nanocomposite films prepared via an in situ polymerization process
Electrical properties of TiO2-filled polyimide nanocomposite films prepared via an in situ polymerization process
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.
0379-6779
2670-2674
Zha, Junwei
988918c3-b4c6-4722-8dff-935625954b09
Dang, Zhimin
6ff3e294-e350-408d-8a69-1b0018876ffa
Zhao, Tao
f50b92e9-9a90-47fb-ba95-d2630b7ffaef
Song, Hongtao
37091748-d222-4ce0-bcc3-7d736529d2b2
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zha, Junwei
988918c3-b4c6-4722-8dff-935625954b09
Dang, Zhimin
6ff3e294-e350-408d-8a69-1b0018876ffa
Zhao, Tao
f50b92e9-9a90-47fb-ba95-d2630b7ffaef
Song, Hongtao
37091748-d222-4ce0-bcc3-7d736529d2b2
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819

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. Synthetic Metals, 160, 2670-2674.

Record type: Article

Abstract

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

Identifiers

Local EPrints ID: 272052
URI: http://eprints.soton.ac.uk/id/eprint/272052
ISSN: 0379-6779
PURE UUID: 90fb2843-79e4-49d7-8c48-9f9edc128936

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Date deposited: 22 Feb 2011 10:29
Last modified: 14 Oct 2019 19:12

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