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http://dx.doi.org/10.9725/kstle.2015.31.3.95

Effects of Multi-walled Carbon Nanotubes on Electrical and Wear Characteristics of High Impact Polystyrene Composites  

Jeong, Yeon-Woo (Dept. of Nano Mechanics, Nano-convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM))
Kim, Kyung-Shik (Dept. of Nano Mechanics, Nano-convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM))
Lee, Hyun-Woo (Halla Visteon Climate Control Corp.)
Jeong, Man-Woo (Hanwha Chemical)
Lee, Jae-Hyeok (Dept. of Materials Science and Engineering, Northwestern University)
Kim, Jae-Hyun (Dept. of Nano Mechanics, Nano-convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM))
Lee, Hak-Joo (Dept. of Nano Mechanics, Nano-convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM))
Kim, Kwang-Seop (Dept. of Nano Mechanics, Nano-convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM))
Publication Information
Tribology and Lubricants / v.31, no.3, 2015 , pp. 95-101 More about this Journal
Abstract
Carbon nanotubes (CNTs) are widely used in polymer composites as filler materials to enhance various characteristics of the composites because of their remarkable mechanical, electrical, and thermal properties. In this study, we investigate the effects of MWCNTs on the electrical and wear characteristics of high-impact polystyrene (HIPS) composites, and compare the results with the effects of carbon black (CB). The HIPS composites are classified as Bare-HIPS, MWCNT-HIPS composites containing 2, 3, 4, and 5 wt% MWCNTs, and CB-HIPS containing 17 wt% CB. Electrical characteristics are evaluated by measuring the surface resistance using a 4-point probe. Wear characteristics are evaluated using the reciprocating wear test, and a chrome steel ball with a curvature of 6.3 mm is used as the counterpart. The results show that the addition of MWCNTs or CB can improve the electrical and wear characteristics of HIPS composites. In the case of MWCNT-HIPS composites, surface resistance, friction coefficient, and specific wear rate decrease as the concentrations of MWCNTs increase. Moreover, the addition of MWCNTs is more effective in improving the electrical and wear characteristics of HIPS composites compared to the addition of CB. To fabricate the HIPS composite with appropriate electrical and wear characteristics, more than 4 wt% MWCNTs is added to HIPS.
Keywords
friction coefficient; high impact polystyrene (HIPS); multi-walled carbon nanotube (MWCNT); surface resistance; wear;
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