Protic cationic oligomeric ionic liquids of the urethane type

Autor: M. A. Gumennaya, V. V. Davydenko, Andriy Dorokhin, A.V. Stryutsky, V. V. Trachevsky, V. V. Shevchenko, Valery N. Bliznyuk, N.S. Klymenko, A. A. Fomenko
Rok vydání: 2014
Předmět:
Zdroj: Polymer Science Series B. 56:583-592
ISSN: 1555-6123
1560-0904
DOI: 10.1134/s156009041405011x
Popis: Protic oligomeric cationic ionic liquids of the oligo(ether urethane) type are synthesized via the reaction of an isocyanate prepolymer based on oligo(oxy ethylene)glycol with M = 1000 with hexamethylene-diisocyanate followed by blocking of the terminal isocyanate groups with the use of amine derivatives of imidazole, pyridine, and 3-methylpyridine and neutralization of heterocycles with ethanesulfonic acid and p-toluenesulfonic acid. The structures and properties of the synthesized oligomeric ionic liquids substantially depend on the structures of the ionic groups. They are amorphous at room temperature, but ethanesulfonate imidazolium and pyridinium oligomeric ionic liquids form a low melting crystalline phase. The proton conductivities of the oligomeric ionic liquids are determined by the type of cation in the temperature range 80–120°C under anhydrous conditions and vary within five orders of magnitude. The resulting compounds are thermally stable up to 200–270°C.
Databáze: OpenAIRE
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