Dielectric relaxation in polyimide nanofoamed films with low dielectric constant

Yihe Zhang; Shanming Ke; Haitao Huang; Lihang Zhao; Li Yu; H. L.W. Chan

doi:10.1063/1.2840715

Dielectric relaxation in polyimide nanofoamed films with low dielectric constant

Yihe Zhang, Shanming Ke, Haitao Huang, Lihang Zhao, Li Yu, H. L.W. Chan

Research output: Journal article publication › Journal article › Academic research › peer-review

35 Citations (Scopus)

Abstract

Polyimide nanofoamed films have been prepared from the polyimide precursors (PMDA-ODA) and poly(ethylene oxide) (PEO) in N,N -dimethylacetamide. The dielectric properties of the films were studied over the temperature range of -150-150 °C and a frequency range of 1 Hz-10 MHz. The frequency dependence of the dielectric constant for nanofoamed films with different amounts of PEO was studied. An relaxation process at below the glass transition temperature of the polyimide nanofoamed films was found. The peak value of the dielectric loss increased with increasing amount of PEO.

Original language	English
Article number	052910
Journal	Applied Physics Letters
Volume	92
Issue number	5
DOIs	https://doi.org/10.1063/1.2840715
Publication status	Published - 15 Feb 2008

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2840715

http://hdl.handle.net/10397/437

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AU - Zhang, Yihe

AU - Ke, Shanming

AU - Huang, Haitao

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AU - Chan, H. L.W.

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AB - Polyimide nanofoamed films have been prepared from the polyimide precursors (PMDA-ODA) and poly(ethylene oxide) (PEO) in N,N -dimethylacetamide. The dielectric properties of the films were studied over the temperature range of -150-150 °C and a frequency range of 1 Hz-10 MHz. The frequency dependence of the dielectric constant for nanofoamed films with different amounts of PEO was studied. An relaxation process at below the glass transition temperature of the polyimide nanofoamed films was found. The peak value of the dielectric loss increased with increasing amount of PEO.

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Dielectric relaxation in polyimide nanofoamed films with low dielectric constant

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