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Investigation of Binary Mixtures Containing 1‑Ethyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)azanide and Ethylene Carbonate
journal contribution
posted on 2015-12-23, 17:51 authored by Andreas Hofmann, Matthias Migeot, Thomas HanemannTemperature dependent viscosity,
conductivity, and density data
of binary mixtures containing ethylene carbonate (EC) and 1-ethyl-3-methylimidazolium
bis(trifluoromethanesulfonyl)azanide (EMIM-TFSA) were
determined at atmospheric pressure in a wide temperature range of
(20 to 120) °C. Additionally, differential scanning calorimetry
(DSC) measurements were performed from (−120 to +100) °C
to characterize phase behavior of the mixtures. On the basis of the
experimental data it is demonstrated that the lattice hole theory
can be applied excellently to the conductivity data of the binary
mixture EMIM-TFSA/EC. The viscosity data were fitted according to
the Vogel–Fulcher–Tammann–Hesse (VFTH) equation
and analyzed with the help of the fractional Walden rule. It is concluded
that the mixtures can be classified as fragile according to ionicity.
The aim of the study is to present fundamental physicochemical data
about the mixtures as a basis for structure–property relationship-calculations
of solvent mixtures or use as electrolytes for various applications.