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Authors Krause, B. ; Cohnen, A. ; Pötschke, P. ; Hickmann, T. ; Koppler, D. ; Proksch, B. ; Kersting, T. ; Hopmann, C.
Title Influence of graphite and SEBS Addition on thermal and electrical conductivity and mechanical properties of polypropylene composites
Date 31.12.2017
Number 49790
Abstract In this study, composites based on polypropylene (PP) and different graphite fillers were melt mixed using small scale microcompounder Xplore DSM15 as well as lab-scale co-rotating twin screw extruder Coperion ZSK26Mc. The measurements of the electrical and thermal conductivity as well as mechanical properties of the composites were performed on pressed plates. It was found that the addition of graphite powders having different particle size distributions leads to different increases of the thermal conductivity. For synthetic graphite, the PP composites filled with TIMCAL Timrex® KS500 reached the highest value of thermal conductivity of 0.52 W/(m·K) at 10 vol% loading, whereas this composite was not electrical conductive.<br />Furthermore, the influence of a styrene-ethylene-butylene-styrene block copolymer (SEBS) based impact modifier on the mechanical properties of PP filled with 80 wt% of different synthetic graphites was investigated. For that the proportion of SEBS in the PP component was varied systematically. The conductivities were influenced by the type of graphite and the content of impact modifier. The results indicate that the impact strength of the composite containing TIMCAL Timrex® KS300-1250 can be increased by approx. 100 % when replacing 50 wt% of the PP component by SEBS.
Publisher AIP Conference Proceedings
Wikidata
Citation AIP Conference Proceedings 1914 (2017) ID030009
DOI http://doi.org/10.1063/1.5016696
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