In polymers, pharmaceuticals, (amorphous) metal alloys metastability is the rule rather than the exception, and the study of the kinetics of such systems has become an important issue. For a thorough understanding of the kinetics of all kinds of temperature- and time-dependent processes related to metastability there is an urgent need for new techniques. DSC is one of the few techniques that have a large dynamic range in relation to measuring rates varying from (quasi) isothermal measurement to measurements at relatively high rates up to 1 MK/s for thin film chip calorimeters.1 Fast cooling is gained by decresing the sample mass and addenda heat capacity of the measuring cell and employing a gas as the cooling medium.2Figure 1: Sample of pure PCL (ca. 20 ng) on the calorimeter chip XI-269 with additional metal particles for temperature calibration on top Calorimeters with high scanning rates allow creation of far from equilibrium states, e.g. polymers without homogeneously formed nuclei.3 Different applications of the device are shown like crystallization kinetics of fast crystallizing polymers,2 melting of proteins without decomposition,4 evaporation of ionic liquids at elevated temperatures,5and some more.References 1. (a) Zhuravlev, E.; Schick, C., Fast scanning power compensated differential scanning nano-calorimeter: 1. The device. Thermochim. Acta 2010,  505 (1-2), 1-13; (b) Zhuravlev, E.; Schick, C., Fast scanning power compensated differential scanning nano-calorimeter: 2. Heat capacity analysis. Thermochim. Acta 2010,  505(1-2), 14-21.2. Minakov, A. A.; Schick, C., Ultrafast thermal processing and nanocalorimetry at heating and cooling rates up to 1 MK/s. Rev. Sci. Instr. 2007,  78(7), 073902-10.3. Zhuravlev, E.; Schmelzer, J. W. P.; Wunderlich, B.; Schick, C., Kinetics of nucleation and crystallization in poly(epsilon caprolactone) (PCL) Polymer 2011,  52, 1983-1997.4. Cebe, P.; Hu, X.; Kaplan, D. L.; Zhuravlev, E.; Wurm, A.; Arbeiter, D.; Schick, C., Beating the Heat - Fast Scanning Melts Silk Beta Sheet Crystals. Scientific Reports 2013,  3(1130), 1-7.5. Ahrenberg, M.; Brinckmann, M.; Schmelzer, J. W. P.; Beck, M.; Schmidt, C.; Ke�ler, O.; Kragl, U.; Verevkin, S. P.; Schick, C., Volatility of ionic liquids at the nanoscale by means of ultra-fast scanning calorimetry. submitted 2013  .

Sub-second kinetics studied by fast scanning calorimetry

247th National Meeting (2014)

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