Catalytic polycyclodehydration of some poly-(o-hydrpxy)amides

Autor:	A.Ya. Chernikhov, O.V. Kachevskii, Yu.I. Kotov, Ye.A Seliverstova, V.V. Korshak, V.A. Isayeva, G.V. Kazakova, A. L. Rusanov
Rok vydání:	1985
Předmět:	chemistry.chemical_classification chemistry.chemical_compound chemistry Strong acids Polymer chemistry General Engineering Organic chemistry Phenol Thermal stability Polymer Catalysis
Zdroj:	Polymer Science U.S.S.R.. 27:2915-2920
ISSN:	0032-3950
DOI:	10.1016/0032-3950(85)90537-4
Popis:	A study has been made of the polycyclodehydration of poly-(o-hydroxy)amides into polybenzoxazoles in N-methyl-2-pyrrolidone medium in presence of acidic catalysts. Optimal conditions for the preparation of high-molecular weight polybenzoxazoles with high degrees of cyclization have been determined. It was found that the thermal stability of polybenzoxazoles synthesized by catalytic polycyclodehydration is practically on a par with that of analogous polymers prepared by thermal solid-phase polycydodehydration of poly-(o-hydroxy)amides, but the polybenzoxazoles dissolve more readily in strong acids and phenol solvents.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::944f0f740af51844725ad6c964ee8fa8 https://doi.org/10.1016/0032-3950(85)90537-4 Zobrazit plný text záznamu