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    Rights statement: This is the author’s version of a work that was accepted for publication in Journal of the Mechanical Behavior of Biomedical Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of the Mechanical Behavior of Biomedical Materials, 111, 2020 DOI: 10.1016/j.jmbbm.2020.103996

    Accepted author manuscript, 1.49 MB, PDF document

    Embargo ends: 25/07/21

    Available under license: CC BY-NC-ND

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Compression moulding and injection over moulding of porous PEEK components

Research output: Contribution to journalJournal article

Published
Article number103996
<mark>Journal publication date</mark>1/11/2020
<mark>Journal</mark>Journal of the Mechanical Behavior of Biomedical Materials
Volume111
Number of pages10
Publication StatusPublished
Early online date25/07/20
<mark>Original language</mark>English

Abstract

A simple and adaptable process for the production of porous PEEK has been demonstrated herein, which uses compression moulding to infiltrate molten PEEK into of a packed bed of salt beads. The process has the capacity to vary the pore size and porosity within the range suitable for materials to replace bone, but compressive testing showed the stiffness to be well below the target to match trabecular bone. This issue was addressed by creating a hybrid structure, integrating “pillars” of solid PEEK into the porous structure, by the injection over-moulding of compression moulded PEEK-salt inserts that contained drilled holes. Good bonding between the moulding and the insert was demonstrated and it was found that as little as 35 mm2 of support, in the form of PEEK “pillars” was required to achieve the target performance.

Bibliographic note

This is the author’s version of a work that was accepted for publication in Journal of the Mechanical Behavior of Biomedical Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of the Mechanical Behavior of Biomedical Materials, 111, 2020 DOI: 10.1016/j.jmbbm.2020.103996