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Tailored Additives to Improve the Electret Performance of Polycarbonates

✍ Scribed by Dominik P. Erhard; Deliani Lovera; Werner Jenninger; Joachim Wagner; Volker Altstädt; Hans-Werner Schmidt

Book ID
102939397
Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
506 KB
Volume
211
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

An electret is a dielectric material exhibiting a quasi‐permanent electric charge. The aim of this work is to give access to PC electret materials with a distinctly improved electret performance. In this context, the charge storage capabilities of corona charged films of several PC grades were investigated by isothermal potential decay measurements at 90 °C. The most promising PC grade was further improved by a new class of bisimide additives. The best additive at the most efficient concentration in combination with a physical aging step yielded excellent PC electrets maintaining almost their complete applied charge even at 90 °C.
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