The isomeric composition of poly(acid)amides according to 13C-NMR spectral data

The complete decoding of the 13C-NMR spectra of poly-(acid)amides (PAA) produced by polycondensing some tetracarboxylic acid dianhydrides, i.e. those of pyromellitic, 3,4,3′,4′-diphenyloxy, 3, 4,3′, 4′-benzophenone, and 3,4,3′,4′-diphenyl, with p-phenylenediamine or benzidine, gave the proportions o...

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Bibliographic Details
Published in:Polymer science USSR 1979, Vol.21 (7), p.1644-1650
Main Authors: Denisov, V.M., Svetlichnyi, V.M., Gindin, V.A., Zubkov, V.A., Kol'tsov, A.I., Koton, M.M., Kudryavtsev, V.V.
Format: Article
Language:English
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Summary:The complete decoding of the 13C-NMR spectra of poly-(acid)amides (PAA) produced by polycondensing some tetracarboxylic acid dianhydrides, i.e. those of pyromellitic, 3,4,3′,4′-diphenyloxy, 3, 4,3′, 4′-benzophenone, and 3,4,3′,4′-diphenyl, with p-phenylenediamine or benzidine, gave the proportions of the m- and p-isomeric chain units present in the PAA. The composition was found to be independent of the diamine present, but dependent on the dianhydride component. A correlation exists between the experimentally determined isomer proportions and the calculated quantum chemical reactivity indices.
ISSN:0032-3950
1878-268X
DOI:10.1016/0032-3950(79)90345-9