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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 8: POSTER: Polymer Physics

CPP 8.20: Poster

Monday, March 26, 2007, 16:00–18:00, Poster B

Combined AC and fast scanning chip calorimetry — •Heiko Huth, Alexander Minakov, and Christoph Schick — Universität Rostock, Institute für Physik, Universitätsplatz 3 18051 Rostock

In the recent years new calorimetric techniques were developed using chip calorimeter based on thin film and silicon technology. Using these chips it is possible to reach fast heating and cooling rates up to 100.000 K/s. This gives new insight in the kinetic of polymer crystallization and reorganization processes not available with standard DSC devices. Another possibility is an extreme sensitive AC calorimetry for very small samples. Due to the fact of the small addenda heat capacity the measured sample is also in the range of nanogram. Here it is possible to measure thin polymer films below 10 nm. The next task was the combination of the advantage of both methods. Using the AC method the investigation of slow processes is possible with high sensitivity. Using fast scanning calorimetry the preparation of the sample prior to the measurement as avoiding crystallization is possible. This gives access to the crystallization kinetics from glass transition to melt for most of the semi crystalline polymers. First investigations of crystallization kinetics with the combined method on different semi crystalline polymers are presented.