Processing and properties of PLA-HA nanocomposites: The effect of particle morphology and dispersants

Tomczynska, Magdalena M.; Ward, Michael; Choong, Gabriel Y. H.; Walton, Kirsty; De Focatiis, Davide S. A.; Grant, David M.; Irvine, Derek J.; Parsons, Andrew J.

Abstract

Biodegradable polylactic acid nanocomposites for orthopaedic implants require optimum particle dispersion and high molecular weight in load bearing applications. Novel coated hydroxyapatite nanoparticles can offer new opportunities for enhanced dispersion during melt compounding. Nanocomposites compounded with a Minilab recirculating twin screw extruder have improved flexural strength when compared to the pure polymer. Dispersion of particles within the matrix was determined from transmission electron micrographs. Chromatography revealed that the polymer matrix of nanocomposites compounded over dry nitrogen had a higher molecular weight than that over air, and hence should exhibit delayed degradation within the body.

Citation

Tomczynska, M. M., Ward, M., Choong, G. Y. H., Walton, K., De Focatiis, D. S. A., Grant, D. M., …Parsons, A. J. (2017). Processing and properties of PLA-HA nanocomposites: The effect of particle morphology and dispersants. In Proceedings of PPS-32: The 32nd International Conference of the Polymer Processing Society - Conference Papers (150004-1 - 150004-5). https://doi.org/10.1063/1.5016781

• Conference Name: 32nd International Conference of the Polymer Processing Society (PPS-32)
• Conference Location: Lyon, France
• Start Date: Jul 25, 2016
• End Date: Jul 29, 2016
• Acceptance Date: May 31, 2017
• Online Publication Date: Dec 15, 2017
• Publication Date: Dec 14, 2017
• Deposit Date: Jun 13, 2019
• Publicly Available Date: Jun 13, 2019
• Publisher: American Institute of Physics
• Volume: 1914
• Pages: 150004-1 - 150004-5
• Series ISSN: 1551-7616
• Book Title: Proceedings of PPS-32: The 32nd International Conference of the Polymer Processing Society - Conference Papers
• ISBN: 978-0-7354-1606-2
• DOI: https://doi.org/10.1063/1.5016781
• Keywords: Polylactic acid, nanocomposites, hydroxyapatite, melt compounding, TEM, GPC, flexural strength
• Public URL: https://nottingham-repository.worktribe.com/output/2183345
• Publisher URL: https://aip.scitation.org/doi/abs/10.1063/1.5016781
• Related Public URLs: http://dx.doi.org/10.17639/nott.43