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Hydroscopicity and Dielectric Properties of Polyimide Containing Biphenyl and Bis-Benzimidazole Rings
Abstract:
A kind of Polyimide films (PI films) containing biphenyl and bis-benzimidazole rings were prepared from the its precursor Polyamic acid (PAA) solution synthesized by aromatic diamine containing biphenyl and bis-benzimidazole rings with different commercial aromatic dianhydrides. The PI films exhibited excellent hydrophobicity with the contact angle of higher than 90o and the hydroscopicity are lower than 1%. The PI films also have great dielectric properties of the dielectric constant ranges from 2.10 to 2.94 under the voltage frequency within 1 to 106 HZ.
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84-87
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January 2014
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© 2014 Trans Tech Publications Ltd. All Rights Reserved
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