Abstract
Phase behavior of twenty-one synthesized salts of triethanolammonium(tris (2-hydroethyl)ammonium) has been studied by the methods of differential scanning calorimetry (DSC) and thermogravimetric analysis (TG). It has been established that 18 of them are protic ionic liquids (PILs) with Tm 100 °C. The PILs have been divided into three groups according to their phase behavior in the DSC experiment. The phase behavior of each of the studied ionic liquids has been analyzed. Multiple regression has been obtained between the ionic liquids characteristics (such as melting, glass transition and decomposition temperatures) determined experimentally and the properties of the anions of the acids forming the PILs calculated by the quantum chemistry methods. It has been shown that there is a linear compensation effect between the changes in the entropy and enthalpy caused by triethanolammonium salts melting.
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