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The usability of recycled carbon fibres in short fibre thermoplastics : interfacial properties

Burn, D. T. and Harper, L. T. and Johnson, M. and Warrior, N. A. and Nagel, U. and Yang, L. and Thomason, J. (2016) The usability of recycled carbon fibres in short fibre thermoplastics : interfacial properties. Journal of Materials Science, 51 (16). pp. 7699-7715. ISSN 1573-4803

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Abstract

The objective of this study was to investigate the feasibility of combining discontinuous recycled carbon fibres with polypropylene, to produce a low-cost, high specific stiffness material for high-volume applications. The inherent low affinity of carbon fibre and polypropylene motivated a detailed study of the surface characteristics of carbon fibre and interfacial behaviour between the two materials, using the microbond test. The effects of removing the sizing from the fibres, as well as introducing a maleic anhydride-grafted polypropylene coupling agent, were extensively investigated. Polypropylene was found to degrade when prepared under atmospheric conditions; therefore, it was necessary to form droplets under nitrogen. Removal of the sizing from the fibre using pyrolysis and solvolysis techniques altered the surface morphology of the fibre and increased the interfacial shear strength (IFSS) by 4 and 33 %, respectively. A more significant improvement in the fibre–matrix adhesion was achieved by adding a maleic anhydride coupling agent at 2 wt%, which increased the IFSS by 320 %.

Item type: Article
ID code: 56547
Keywords: carbon fibres, thermoplastics, surface characteristics, interfacial behaviour, Mechanical engineering and machinery, Materials Science(all), Mechanics of Materials
Subjects: Technology > Mechanical engineering and machinery
Department: Faculty of Engineering > Electronic and Electrical Engineering
Faculty of Engineering > Mechanical and Aerospace Engineering
Depositing user: Pure Administrator
Date deposited: 27 May 2016 10:22
Last modified: 25 Sep 2017 09:39
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URI: https://strathprints.strath.ac.uk/id/eprint/56547
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