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Development of a closed-loop recycling process for discontinuous carbon fibre polypropylene composites

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)222-231
Number of pages10
JournalComposites Part B: Engineering
Volume146
Early online date29 Mar 2018
DOIs
DateAccepted/In press - 28 Mar 2018
DateE-pub ahead of print - 29 Mar 2018
DatePublished (current) - 1 Aug 2018

Abstract

In this study the effects of a closed-loop recycling methodology are evaluated for degradation using a discontinuous carbon fibre polypropylene (CFPP) composite material. The process comprises two fundamental steps, reclamation and remanufacture. The material properties are analysed over two recycling loops. For neat polypropylene, the molecular weight analysis indicates evidence of minimal matrix degradation that does not affect the material behaviour, as demonstrated by the shear tests. CFPP specimens show no decrease in mechanical properties over repeated loops, the final specimens show an increase of 26% and 43% in ultimate tensile strength and ultimate strain, respectively. These are attributed to cumulative matrix residue on the fibre surface after reclamation and subsequently increased fibre-matrix adhesion. The improvement of CFPP properties and insignificant variability in the tensile properties and molecular weight distribution of neat polypropylene validate the potential of this proof-of-concept, closed-loop recyclable material. Future studies will investigate alternative, higher performance matrices.

    Research areas

  • Recycling, Polymer-matrix composites (PMCs), Compression moulding, Discontinuous reinforcement

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  • Full-text PDF (accepted author manuscript)

    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Elsevier at https://www.sciencedirect.com/science/article/pii/S1359836818301896 . Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 252 KB, PDF document

    Licence: CC BY-NC-ND

  • Supplementary information PDF

    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Elsevier at https://www.sciencedirect.com/science/article/pii/S1359836818301896 . Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 874 KB, PDF document

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