Thermophysical properties of hydroxyl ammonium ionic liquids

The thermophysical properties of hydroxyl ammonium ionic liquids: density q, T = (293.15 to 363.15) K;
dynamic viscosity g, T = (298.2 to 348.2) K; and refractive indices nD, T = (293.15 to 333.15) K have been
measured. The coefficients of thermal expansion a, values were calculated from the experimental density
results using an empirical correlation for T = (293.15 to 363.15) K. The variation of volume expansion of
ionic liquids studied was found to be independent of temperature within the range covered in the present
work. The thermal decomposition temperature ‘Td’ for all the six hydroxyl ammonium ionic liquids is also
investigated using thermogravimetric analyzer (TGA).