Regensburg 2010 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 5: New Instruments and Methods
CPP 5.3: Talk
Monday, March 22, 2010, 10:45–11:00, H39
Temperature Measurements within a Laser Heating Process on Polymer Films — •Ralf S. Kappes1 and Jochen S. Gutmann1,2 — 1Max Planck Institute for Polymer Research, Mainz, Germany — 2Joh.-Gutenberg University, Mainz, Germany
There are multiple ways of measuring temperatures nowadays. Still the task of detecting high temperatures, i.e. around 1000 Kelvin with a microsecond time and a micrometer size resolution is quite challenging. However, the temperature is an important factor if it comes to the understanding of processes which proceed in those orders of magnitude, like for example laser heating on polymer films. To achieve this goal we set up an optical detection system using high performance optics and a microsecond gated camera in combination with various interference filters to detect the thermal emission spectrum in the Vis range. Analyzing the radiation data via a fit of Planck's law to the obtained curve we are finally able to collect a 2D temperature profile for time intervals as short as one microsecond within a process. In this way we can show, that a polymer film, which is doped with an organic dye for energy conversion, can reach temperatures of at least 900 Kelvin, which is high above its "normal" decomposition temperature, determined e.g. from thermogravimetric methods. And it is furthermore possible for us to achieve a relation between the temperature in process and the effect on the polymer film afterwards.