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- W1569083886 abstract "As part of a detailed NASA-sponsored study of chemical composition/property sensitivity of the LARC-160 polymerization of monomeric reactants (PMR) polyimide system, a number of liquid chromatographic techniques have been employed. The ester monomers in this system are characterized by a reverse-phase ion-suppression method. Mono, di, and triesters of the 3,3',4,4'-benzophenonetetracarboxylic acid ingredient are identified and their isomeric forms resolved. The 5-norbornene-2,3-dicarboxylic acid ester (nadic ester) endcapper is detected by low wavelength ultraviolet sensing. A second method, reverse-phase ion-pair chromatography, is employed for determining unreacted amines. The extent of resin B-staging is monitored through analysis of the ester/amine oligomers." @default.
- W1569083886 created "2016-06-24" @default.
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- W1569083886 date "1980-01-01" @default.
- W1569083886 modified "2023-09-26" @default.
- W1569083886 title "Chemical analysis of LARC-160 polyimide" @default.
- W1569083886 hasPublicationYear "1980" @default.
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