NDLI: Electrical conduction in polyimide-FEP fluoropolymer films

Content Provider	IEEE Xplore Digital Library
Author	Shaikh, R. Raju, G.R.G.
Copyright Year	2002
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Windsor Univ., Ont., Canada (Shaikh, R.; Raju, G.R.G.)
Abstract	The aromatic polyimide has excellent mechanical, electrical and chemical properties. Absorption and conduction currents are studied over a temperature range of 50 to 200/spl deg/C in Teflon coated film (25.4 /spl mu/m Kapton/spl reg/ base with 12.7 /spl mu/m coating of Teflon/spl reg/ FEP fluoropolymer resin on one side) and the influence of parameters such as field strengths and electrode materials are investigated. The charging current decays with time according to t/sup -n/ (decay constant) with the value of index n in the range of 0.66 to 1.25. The discharging current decreases with the value of n in the range of 1.47 to 1.59 for the temperature range investigated. The dielectric loss factors at low frequency were evaluated from the absorption currents. For temperature up to 90/spl deg/C one broad peak is observed at frequencies around 3/spl times/10/sup -4/ Hz. For temperatures (>120/spl deg/C) the magnitude of the loss factor increases by an order of magnitude and no peaks are observed. Results on conduction currents are also reported for temperatures 90-200 /spl deg/C and fields up to 100 kV/cm. The activation energy of 0.70 eV and the ionic jump distance in the range 19-28 nm have been evaluated.
Starting Page	578
Ending Page	581
File Size	264772
Page Count	4
File Format	PDF
ISBN	0780375025
DOI	10.1109/CEIDP.2002.1048862
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-20
Publisher Place	Mexico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Conductive films Absorption Temperature distribution Dielectric losses Frequency Polyimides Chemicals Mechanical factors Coatings Resins
Content Type	Text
Resource Type	Article

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