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Lubricants 2016, 4(2), 20; doi:10.3390/lubricants4020020

Tribology of Graphite-Filled Polystyrene

Imerys Graphite & Carbon Switzerland Ltd., Strada Industriale 12, 6743 Bodio, Switzerland
Academic Editors: Werner Oesterle and Ga Zhang
Received: 14 March 2016 / Revised: 6 April 2016 / Accepted: 18 May 2016 / Published: 9 June 2016
(This article belongs to the Special Issue Tribofilms and Solid Lubrication)
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Abstract

Self-lubricating polymer compounds are currently used for a wide range of applications such as bearings, gears, and water meters. Under severe conditions such as high pressure, high velocity, and/or high temperatures, the material fails (PV limit). In this study, we investigated the effect of graphite on the tribological properties of polystyrene (PS) with “ball-on-three-plates” tests. Graphite-filled PS plates were produced via an internal mixer and compression molding. Unhardened steel (1.4401) and nylon (PA66) balls were used for the tribological tests. Our results indicate that graphite loading, graphite type, and particle size have a big influence on the friction coefficient, the wear resistance, and the PV limit of PS both against steel and PA66. In particular, primary synthetic graphite performs better than secondary synthetic graphite due to the higher degree of crystallinity. View Full-Text
Keywords: graphite; solid lubricant; polystyrene; thermal conductivity graphite; solid lubricant; polystyrene; thermal conductivity
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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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Gilardi, R. Tribology of Graphite-Filled Polystyrene. Lubricants 2016, 4, 20.

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