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

Autor:	Jaroslav Straka, Miroslav Marek, Pavel Schmidt, Bohumil Bednář, Bohdan Schneider, Jaroslav Králíček
Rok vydání:	1990
Předmět:	Polymers and Plastics Chemistry Organic Chemistry Solid-state General Physics and Astronomy Infrared spectroscopy Nuclear magnetic resonance spectroscopy Spectral line Pyromellitic acid dianhydride Investigation methods Polymer chemistry Materials Chemistry Physical chemistry Spectroscopy Polyimide
Zdroj:	European Polymer Journal. 26:941-945
ISSN:	0014-3057
Popis:	i.r. and 13C-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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::45fd02d6587bdc8c079056cdeeb449c7 https://doi.org/10.1016/0014-3057(90)90105-d Zobrazit plný text záznamu