Abstract
Four vinyl monomers containing a covalently bonded cation ethylimidazolium and various anions—Br−, (CF3SO2)2N−, (CN)2N−, and CF3SO −3 —have been synthesized. High-molecular-mass polymers (M w up to 1.84 × 106) having the structure of ionic liquids have been prepared via the free-radical polymerization of 1-vinyl-3-ethylimidazolium in bulk and molecular and ionic solvents. The thermal stability and heat resistance of the resulting polymer salts have been estimated. It has been demonstrated that the thermal characteristics of these salts significantly depend on the nature of anions. The glass-transition temperatures of the polymers range from 19 to 235°C. The ionic conductivity of the polymer salts and their compositions with individual ionic liquids has been studied in the frequency range 50–106 Hz. The highest conductivity (1.5 × 10−5 S/cm) is exhibited by the polymer containing the (CN)2N− anion.
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Original Russian Text © Ya.S. Vygodskii, O.A. Mel’nik, A.S. Shaplov, E.I. Lozinskaya, I.A. Malyshkina, N.D. Gavrilova, 2007, published in Vysokomolekulyarnye Soedineniya, Ser. A, 2007, Vol. 49, No. 3, pp. 413–420.
This work was supported by the Russian Foundation for Basic Research, project no. 05-03-08073 ofi-a.
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Vygodskii, Y.S., Mel’nik, O.A., Shaplov, A.S. et al. Synthesis and ionic conductivity of polymer ionic liquids. Polym. Sci. Ser. A 49, 256–261 (2007). https://doi.org/10.1134/S0965545X07030042
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DOI: https://doi.org/10.1134/S0965545X07030042