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- Title
Electrothermal lifetime prediction of polyimide wire insulation with application to aircraft.
- Authors
Hondred, Peter R.; Bowler, Nicola; Kessler, Michael R.
- Abstract
ABSTRACT This work investigates the electrothermal lifetime of a commonly used polyimide wire insulation material, Kapton®, through the use of thermogravimetry (TG) and breakdown voltage testing. From TG, an isoconversional model-free kinetic evaluation was used to obtain a relationship between the activation energies of degradation for Kapton as a function of weight loss. By relating the electrical life theory and the TG theory through the model defined by Toop ( IEEE Trans. Dielectr. Electr. Insul. 1971, 6, 2), the electrothermal lifetime of Kapton has been calculated for conditions of 12 and 14.7 kV over a temperature range of 250-400°C. The resulting model can be used to make lifetime predictions for wire insulation degradation in aging aircraft for improved safety and risk assessment. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1639-1644, 2013
- Subjects
POLYIMIDES; THERMAL insulation; HEAT transfer; THERMOGRAVIMETRY; ELECTRIC potential; KAPTON (Trademark)
- Publication
Journal of Applied Polymer Science, 2013, Vol 130, Issue 3, p1639
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.39304