Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Highly Thermal Resistant and Flexible Polyimide Aerogels Containing Rigid-rod Biphenyl, Benzimidazole and Triphenylpyridine Moieties: Synthesis and Characterization
Dengxiong ShenJingang LiuHaixia YangShiyong Yang
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JOURNAL RESTRICTED ACCESS Advance online publication

Article ID: 130758

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Abstract

Polyimide aerogels containing rigid-rod biphenyl, benzimidazole and triphenylpyridine moieties have been developed. The flexible PI aerogels exhibited excellent thermal stability with glass transition temperatures (Tg) higher than 350 oC. Initial porous structures in the PI aerogels could be maintained even after isothermal aging at 300 oC for 24 h in nitrogen. Furthermore, the weight losses of the aerogels after isothermal aging at 300 oC and 400 oC for 24 h in nitrogen were below 5 wt% and 10 wt%, respectively.

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© 2013 The Chemical Society of Japan
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