Measurement technique for thermal conductivity of thin polymer films |
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Authors: | Ulrich Gubler Matthias Raunhardt Andrin Stump |
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Affiliation: | CSEM SA, Untere Gründlistrasse 1, CH-6055 Alpnach, Switzerland |
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Abstract: | We present a modified steady-state heat flow technique, which allows measuring the thermal conductivity of films applied on a substrate. The measurement technique with the here presented setup provides an accuracy (overestimation) of 5-10% for film thickness up to 100 μm. For thicker films a correction factor based on finite-element simulations has to be used or the geometry has to be adapted. The technique is validated with thin glass plates of known thermal conductivity. To demonstrate the application of the technique the thermal conductivity of a thin polymer film of fluorinated acrylate is determined as 0.19 ± 0.02 W/mK. |
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Keywords: | Thermal conductivity Polymers Material characterization Heat flow |
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