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Article

Effects of Die Configuration on the Electrical Conductivity of Polypropylene Reinforced Milled Carbon Fibers: An Application on a Bipolar Plate

1
Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, 43600 UKM, Malaysia
2
Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia
3
Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia
*
Author to whom correspondence should be addressed.
Polymers 2018, 10(5), 558; https://doi.org/10.3390/polym10050558
Received: 9 April 2018 / Revised: 7 May 2018 / Accepted: 17 May 2018 / Published: 22 May 2018
Die configurations, filler orientations, electrical conductivity, and mechanical properties of polypropylene reinforced milled carbon fibers were studied as functions of their manufacturing processes. Series of manufacturing processes often deteriorate the material properties, hence, finding a suitable process aid is key to improving the electrical and mechanical properties of composite materials. Compared with the conventional manufacturing process, extrusion is a key process in the production of a highly conductive composite. A twin-screw extruder was used at a temperature of 230 °C and a rotational speed of 50 rpm before the compression molding process was carried out at 200 °C and 13 kPa. This research examined different die configurations, namely rod and sheet dies. The results indicated that the rod dies showed better mechanical properties and electrical conductivity with 25 MPa and 5 S/cm compared to the sheet dies. Moreover, rod dies are able to orientate to 86° and obtain longest filler length with 55 μm compared to the sheet dies. The alteration of the filler orientation in the produced material at a high shear rate further enhanced the electrical conductivity of the material. View Full-Text
Keywords: carbon fibers; electrical conductivity; extrusion; bipolar plate carbon fibers; electrical conductivity; extrusion; bipolar plate
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MDPI and ACS Style

Mohd Radzuan, N.A.; Sulong, A.B.; Rao Somalu, M.; Majlan, E.H.; Husaini, T.; Rosli, M.I. Effects of Die Configuration on the Electrical Conductivity of Polypropylene Reinforced Milled Carbon Fibers: An Application on a Bipolar Plate. Polymers 2018, 10, 558. https://doi.org/10.3390/polym10050558

AMA Style

Mohd Radzuan NA, Sulong AB, Rao Somalu M, Majlan EH, Husaini T, Rosli MI. Effects of Die Configuration on the Electrical Conductivity of Polypropylene Reinforced Milled Carbon Fibers: An Application on a Bipolar Plate. Polymers. 2018; 10(5):558. https://doi.org/10.3390/polym10050558

Chicago/Turabian Style

Mohd Radzuan, Nabilah A.; Sulong, Abu B.; Rao Somalu, Mahendra; Majlan, Edy H.; Husaini, Teuku; Rosli, Masli I. 2018. "Effects of Die Configuration on the Electrical Conductivity of Polypropylene Reinforced Milled Carbon Fibers: An Application on a Bipolar Plate" Polymers 10, no. 5: 558. https://doi.org/10.3390/polym10050558

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