Dresden 2014 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 54: Poster Session 3
CPP 54.16: Poster
Donnerstag, 3. April 2014, 15:00–19:00, P2
High frequency laser modulated AC chip calorimeter — •Yeong Zen Chua, Evgeni Shoifet, and Christoph Schick — Institute of Physics, University of Rostock, Rostock 18051, Germany
Combination of different techniques for heat capacity spectroscopy and temperature-modulated calorimetry (TMDSC) allows the determination of complex heat capacity in a wide frequency range. TMDSC covers a limited frequency range from about 10−5 Hz to 0.1 Hz. An AC chip calorimeter gives the possibility to decrease the size of the measured sample, hence increases the sensitivity and frequency range. However, the investigation of the dynamic glass transition is still limited to the frequencies up to a few kHz. A new AC chip calorimeter with laser heating is capable of measuring the glass transition temperature of thin film samples in the frequency range up to 1 MHz. The dynamic glass transition of polystyrene and poly(methyl methacrylate) was studied in the frequency range of 10−5 Hz to 1 MHz with different calorimetric techniques.