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Characterization of PEEK biomaterials using the small punch test
Journal article   Peer reviewed

Characterization of PEEK biomaterials using the small punch test

David J. Jaekel, Daniel W. MacDonald and Steven M. Kurtz
Journal of the mechanical behavior of biomedical materials, v 4(7), pp 1275-1282
2011
DOI: https://doi.org/10.1016/j.jmbbm.2011.04.014
PMID: 21783136
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

Barium sulphate Crystallinity Mechanical properties PEEK Polyetheretherketone Radiopacifier Small punch test
The small punch test is widely used to characterize the ductility and fracture resistance in metals and ceramics, when only a small volume of material is available. This study was conducted to investigate the suitability of the small punch test for characterizing polyetheretherketone (PEEK) polymeric biomaterials for changes in material grade, crystallinity, and molding process. The small punch test reproducibly characterized the mechanical behavior of PEEK and was able to distinguish differences induced by molding process alterations and annealing. Peak load was most sensitive to changes in crystallinity, grade, molding process, and increased with increasing crystallinity, but decreased with the addition of image contrast materials. The ultimate displacement was negatively correlated with crystallinity. Molding process conditions had the greatest influence on metrics of the small punch test, when compared with the effects of annealing and the addition of a radiopacifier. The results of this study validate the small punch test as a repeatable method for measuring the mechanical behavior of PEEK biomaterials. [Display omitted] ► The small punch test was adapted for use with PEEK materials. ► Unfilled and image contrast grades of PEEK were evaluated at three crystallinity levels. ► The most sensitive parameter measured was peak load. ► The test distinguished differences due to crystallinity, processing, or grade. ► Higher crystallinity conferred less ductility, but higher strength to the material.

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62 citations in Web of Science
64 citations in Scopus

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Collaboration types
Industry collaboration
Domestic collaboration
Web of Science research areas
Engineering, Biomedical
Materials Science, Biomaterials
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