The use of ionic liquids as novel solvents for the synthesis of condensation polymers was investigated. A series of ionic liquids including new ones was synthesized and purified. 1,3-Dialkylimidazolium-based ionic liquids seem to be suitable reaction and activating media for the synthesis of high-molecular-weight aromatic polyimides and polyamides. Inherent viscosities of the polymers obtained in 1,3-dialkylimidazolium bromides range from 0.52 to 1.35 dL/g.
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Vygodskii et al. (2002) studied this question.