Thermogravimetric analysis, ionic liquids

An important property of an ionic liquid in terms of its applications in biomass processing is its thermal stability, which is usually measured by thermogravimetric analysis. Nucleophilicity of the anion has been found to have an effect on the thermal stability of many ionic liquids due the role of the anion in the degradation of the cation [76], Quaternary ammonium, imidazolium, phosphonium and pyrrolidinium cations degrade at lower temperatures in the presence of highly nucleophilic anions such as halides due to Hoffman elimination and reverse Menschutkin reactions [76-79],... 

Seeberger, A., Andresen, A.K., and Jess, A. (2009) Prediction of long-term stability of ionic liquids at elevated temperatures by means of non-isothermal thermogravimetrical analysis. Phys. 

Heym, F., Etzold, B.J.M., Kern, C., and Jess, A. (2011) Analysis of evaporation and thermal decomposition of ionic liquids by thermogravimetrical analysis at ambient pressure and high vacuum. Green Chem.(accepted). doi 10.1039/C0GC00876A... 

Thermal properties PLA, ionic liquids and their compounds were characterized, a) by differential scanning calorimetry, DSC, (TA Instruments, QA 100 analyzer) from 0°C to 150°Qt a heating rate of 20°lGnin to determine glass transition temperature and b) by thermogravimetric analysis, TGA, (TA Instruments, QA 50 analyzer) from room temperature to 500°C, at a heating rate of 20°C /min in a nitrogen atmosphere to determine thermal stability. 

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