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i.r. and 13C-CP-MAS-NMR spectra of pyromellitide and of its precursor based on 4,4′-diaminodiphenylmethane

✍ Scribed by B Schneider; P Schmidt; M Marek Jr; J Straka; B Bednář; J Králíček

Book ID: 103076918
Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 411 KB
Volume: 26
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(90)90105-d

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✦ Synopsis

i.r. and ~3C-CP-MAS-NMR spectra were recorded for polyamidocarboxylic acid, polyimide and polyisoimide based on pyromellitic acid dianhydride (PMDA) and 4,4'-diaminodiphenylmethane (MDA), and of polyimide based on PMDA and 4,4'-diaminodiphenylether. The 13C-NMR spectra were interpreted and bands in solid state 13C-NMR spectra suitable for characterizing the structure of the PMDA/MDA polyimide were found. By measurement of i.r. spectra, the applicability of i.r. spectroscopy for monitoring the imidization of polyamidocarboxylic acid in PMDA/MDA was verified. Bands indicating the occurrence of precursor side reactions have not been observed in any of the studied spectra.

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