Investigation on chemical cyclization of polyamic acid

Autor:	Andrzej Orzeszko, T. Chreptowicz, J. Żurakowska-Orszàgh
Rok vydání:	1980
Předmět:	chemistry.chemical_classification Polymers and Plastics Pummerer rearrangement Organic Chemistry General Physics and Astronomy Polymer Benzidine chemistry.chemical_compound Acetic anhydride chemistry Acetyl chloride Pyridine Materials Chemistry Polyamic acid Organic chemistry Imide
Zdroj:	European Polymer Journal. 16:289-291
ISSN:	0014-3057
DOI:	10.1016/0014-3057(80)90217-7
Popis:	Investigations of the chemical cyclization of polyamic acid, obtained from pyromellitic anhydride and benzidine, were performed. Using various dehydrating agents like acetyl chloride, acetic anhydride, trifluoracetic anhydride and the system acetic anhydride:pyridine (5:1), different ratios of the isoimide/imide forms were detected in the polymer by i.r. spectroscopy. A possible mechanism is suggested.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e8b5892b7157208e6bcd3880cc0c9933 https://doi.org/10.1016/0014-3057(80)90217-7 Zobrazit plný text záznamu