Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 11: New Instruments and Methods

CPP 11.11: Vortrag

Dienstag, 27. März 2012, 12:30–12:45, C 243

Application of novel thermal cantilever in the field of polymer science — •Thomas Fischinger, Martin Laher, Günther Gratzl, and Sabine Hild — Department of Polymer Sciences, Johannes Kepler University, Linz, Austria

Thermal analysis methods are generally used to provide important and reliable data on polymeric materials. However, up to now mainly bulk properties of polymers have been detected. Their fields of operation reach a limit for applications such as investigation of thin films, immiscible polymer blends, boundary effects etc. Therefore, a method is proposed for nano-thermal characterization of polymers using scanning probe microscopy in combination with heatable cantilever probes. This method is based on an appropriate temperature calibration, which provides a reliable correlation between applied voltage and the temperature at the tip. Since it has been shown that the presented technique is substantially more susceptible to environmental changes, such as layer thickness, substrate material etc. than comparable macroscopic approaches, parameters that might influence the performance have been evaluated. To verify the validity and show the possibilities of this method, local thermal analysis measurements were performed on different polymer samples. The glass transition- and melting temperature obtained by our approach agrees well with the value measured using conventional bulk methods.