NASA NTRS · 19740012677
Isomer effects on polyimide properties
Abstract
The polymerization of 2,4'-methylene-dianiline with benzophenone tetracarboxylic acid dianhydride yields high molecular weight polyamic acid. Polyimide is formed when films of the polyamic acid are cured between 200 - 300 C. A lower molecular weight polyamic acid is obtained from 2,2'-MDA with BTDA, but it appears that a lowering of the reaction temperature will yield high molecular weight polymer. Evaluation of these polymers is underway. Continued efforts to synthesize 2,3'- MDA and 2,3'-diaminobenzophenone have met with little success.
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Stump, B. L.. 1974-02-26. Isomer effects on polyimide properties. https://ntrs.nasa.gov/citations/19740012677
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