38 research outputs found
Vapor Pressure of Ionic Liquids
We argue that the extremely low vapor pressures of room temperature ionic
liquids near their triple points are due to the combination of strong ionic
characters and of low melting temperatures.Comment: Initially submitted manuscript of article M. Bier and S. Dietrich,
Mol. Phys. 108, 211 (2010) [Corrigendum: Mol. Phys. 108, 1413 (2010)
Water sorption equilibrium on 2-Hydroxyethyl-trimethylammonium acetate in the temperature range 298.25â349.55 K
Isoconversional kinetic analysis applied to five phosphoniumcation-based ionic liquids
Thermal degradation of five phosphonium cation-based ionic liquids ([P66614][BEHP], [P66614][(iC8)2PO2],[P66614][NTf2], [P44414][DBS] and [P4442][DEP]) was studied using dynamic methodology (25â600âŠC at 5,10 and 20âŠC/min) in both inert (nitrogen) and reactive (oxygen) atmospheres. In addition, isothermalexperiments (90 min at 200, 225 and 250âŠC) were carried out with [P66614][(iC8)2PO2]. Results indicatethat thermal stability is clearly dominated by the coordination ability of the anion, with [P66614][NTf2] out-performing the other ones in both pyrolytic and oxidising conditions. Although the thermal degradationmechanism is affected by atmospheric conditions, the degradation trend remains practically constant.As the dynamic methodology usually overestimates the long-term thermal stability, an isoconversionalmethodology is better for predicting the long-term thermal stability of these ionic liquids in order to beused as base oil or additive in lubricants formulation. Finally, the model-free methodology can predict atlower costs the ILs performance in isothermal conditions