Polyheteroarylenes based on 2,3,7,8-tetraaminodibenzo-p-dioxin and aromatic polyfunctional carboxylic acids.

Autor:	Mognonov, D. M., Ayurova, O. Zh., Il'ina, O. V., Khakhinov, V. V.
Předmět:	DIOXINS AROMATIC compounds CARBOXYLIC acids POLYCONDENSATION SULFONIC acids ARYLENE group TENSILE strength
Zdroj:	Russian Chemical Bulletin; Oct2018, Vol. 67 Issue 10, p1903-1907, 5p
Abstrakt:	Polynaphthoylene benzimidazole and polybenzimidazole were obtained via polycondensation of 2,3,7,8-tetraaminodibenzo-p-dioxin with aromatic di- and tetracarboxylic acids in polyphosphoric acid. From a solution of polynaphthoylene benzimidazole in methanesulfonic acid a heat-resistant fiber with high tensile strength was obtained. Aromatic polybenzimidazoles are promising materials for producing membranes of medium-temperature fuel cells. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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