Thermalization calorimetry: A simple method for investigating glass transition and crystallization of supercooled liquids

We present a simple method for fast and cheap thermal analysis on supercooled glass-forming liquids. This “Thermalization Calorimetry” technique is based on monitoring the temperature and its rate of change during heating or cooling of a sample for which the thermal power input comes from heat condu...

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Bibliographic Details
Published in:AIP advances 2016-05, Vol.6 (5), p.055019-055019-16
Main Authors: Jakobsen, Bo, Sanz, Alejandro, Niss, Kristine, Hecksher, Tina, Pedersen, Ib H., Rasmussen, Torben, Christensen, Tage, Olsen, Niels Boye, Dyre, Jeppe C.
Format: Article
Language:English
Subjects:
Conduction heating
Conductive heat transfer
Cooling rate
Crystallization
Endothermic reactions
Glass
Heat
Heat measurement
Liquid phases
Liquids
Melting points
Signal monitoring
Specific heat
Temperature
Temperature gradients
Thermal analysis
Thermalization (energy absorption)
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Summary:We present a simple method for fast and cheap thermal analysis on supercooled glass-forming liquids. This “Thermalization Calorimetry” technique is based on monitoring the temperature and its rate of change during heating or cooling of a sample for which the thermal power input comes from heat conduction through an insulating material, i.e., is proportional to the temperature difference between sample and surroundings. The monitored signal reflects the sample’s specific heat and is sensitive to exo- and endothermic processes. The technique is useful for studying supercooled liquids and their crystallization, e.g., for locating the glass transition and melting point(s), as well as for investigating the stability against crystallization and estimating the relative change in specific heat between the solid and liquid phases at the glass transition.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4952404