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Polymers 2018, 10(4), 457; https://doi.org/10.3390/polym10040457

Thermal Conductivity of Aluminosilicate- and Aluminum Oxide-Filled Thermosets for Injection Molding: Effect of Filler Content, Filler Size and Filler Geometry

Institute of Polymer Technology, University Erlangen-Nurenberg, Erlangen 91058, Germany
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Received: 26 March 2018 / Revised: 17 April 2018 / Accepted: 18 April 2018 / Published: 20 April 2018
(This article belongs to the Special Issue Thermal Properties and Applications of Polymers)
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Abstract

In this study, epoxy molding compounds (EMCs) with aluminosilicate (AlS) and aluminum oxide (AlO) were fabricated as fillers by a twin-screw-extruder (TSE) and shaped to plate samples using injection molding. AlS and AlO, electrical insulating mineral materials, were used as fillers to improve the thermal conductivity (λc) of composites. Composites with different filler particle sizes, filler contents and filler geometry were fabricated and the influence of these variables on the λc was studied. The λc of composites was measured with the hot-disk method. The distribution of fillers in composites was observed using scanning electron microscopy (SEM). Using the Lewis-Nielsen equation, experimental values of λc were compared with those predicted. The predicted results fit the experimental values well. The result showed that λc increases significantly when the filler content of composites is approximately over 50 vol %. View Full-Text
Keywords: thermal conductive polymer composite; aluminosilicate; aluminum oxide; EMC; spheres filler; irregular filler; injection molding; Lewis-Nielsen’s equation thermal conductive polymer composite; aluminosilicate; aluminum oxide; EMC; spheres filler; irregular filler; injection molding; Lewis-Nielsen’s equation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhao, Y.; Zhai, Z.; Drummer, D. Thermal Conductivity of Aluminosilicate- and Aluminum Oxide-Filled Thermosets for Injection Molding: Effect of Filler Content, Filler Size and Filler Geometry. Polymers 2018, 10, 457.

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