NASA NTRS · 20080007373
Polyimide foams
Abstract
Copolyimide foams derived from a diester of 3,3',4,4'-benzophenonetetracarboxylic acid, an aromatic diamine, and a heterocyclic diamine. A molar concentration of the heterocyclic diamine approaching but not exceeding 0.42 is employed. This results in a flexible foam with a homogeneous cellular structure and a reduced compression set loss.
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Gagliani, John, Lee, Raymond, Sorathia, Usman A. K.. 1982-10-19. Polyimide foams. https://ntrs.nasa.gov/citations/20080007373
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