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Tailored Additives to Improve the Electret Performance of Polycarbonates
Author(s) -
Erhard Dominik P.,
Lovera Deliani,
Jenninger Werner,
Wagner Joachim,
Altstädt Volker,
Schmidt HansWerner
Publication year - 2010
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000171
Subject(s) - electret , materials science , dielectric , context (archaeology) , isothermal process , charge (physics) , composite material , corona (planetary geology) , polymer chemistry , chemical engineering , optoelectronics , thermodynamics , physics , engineering , paleontology , quantum mechanics , astrobiology , venus , biology
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.