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
Available under license: CC BY-NC-ND
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Compression moulding and injection over moulding of porous PEEK components
AU - Siddiq, A.
AU - Kennedy, A.R.
N1 - 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
PY - 2020/11/1
Y1 - 2020/11/1
N2 - 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.
AB - 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.
KW - Compression testing
KW - Injection moulding
KW - PEEK
KW - Porous structure
KW - Compression molding
KW - Packed beds
KW - Pore size
KW - Well testing
KW - Compressive testing
KW - Drilled holes
KW - Hybrid structure
KW - Porous structures
KW - Trabecular bones
KW - Injection molding
U2 - 10.1016/j.jmbbm.2020.103996
DO - 10.1016/j.jmbbm.2020.103996
M3 - Journal article
VL - 111
JO - Journal of the Mechanical Behavior of Biomedical Materials
JF - Journal of the Mechanical Behavior of Biomedical Materials
SN - 1751-6161
M1 - 103996
ER -