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 publicationJournal articleAcademic researchpeer-review

32 Citations (Scopus)


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 languageEnglish
Article number052910
JournalApplied Physics Letters
Issue number5
Publication statusPublished - 15 Feb 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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