Linear aromatic polyimides containing cyclobutene-3,4,-dione moieties synthesized in experiments. Polymers exhibit high thermal and thermo-oxidative stabilities, making them useful in structural components exposed to hot and/or oxidative environments, as in jet engines and on outer surfaces of supersonic aircraft. Electrons in cyclobutene-3,4-dione moieties readily excited to states of higher energy upon exposure to ultraviolet light, giving rise to electronic properties with potential utility in photovoltaic, photoconductive, and/or photoemissive devices.
Polyimides That Contain Cyclobutene-3,4-Dione Moieties
NASA Tech Briefs ; 19 , 5
1995-05-01
Miscellaneous
No indication
English
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