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Effect of ceramic filler content on the mechanical and thermal behaviour of poly-L-lactic acid and poly-L-lactic-co-glycolic acid composites for medical applications
University of Borås, School of Engineering.
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2010 (English)In: Journal of materials science. Materials in medicine, ISSN 0957-4530, E-ISSN 1573-4838, Vol. 21, no 9, 2523-2531 p.Article in journal (Refereed)
Abstract [en]

One main application of resorbable poly-Llactic acid (PLLA) and poly-L-lactic-co-glycolic acid (PLGA) based materials is in medical implants. In this study composites were made from PLLA and PLGA with hydroxyapatite (HAp) respective b-tricalcium phosphate (b-TCP) fillers. The filler content and particle size were varied, and the thermal properties as well as the mechanical strength of the composites were investigated. The composites were made by an extrusion compounding process giving 2–2.5 mm diameter sized profiles. The results verified that the thermal stability of the composites was reasonable during the optimized compounding conditions. Scanning electron microscopy revealed that the fillers were well dispersed in the polymer matrices. The mechanical properties were improved by the addition of the fillers. The optimum mechanical properties for the extruded profiles were obtained with the HAp fillers. The E-modulus was increased from 3.3 to 4.6 GPa by addition of filler particles (30 wt%) whereas the flexural strength was reduced from 133 to 106 MPa.

Place, publisher, year, edition, pages
Springer New York LLC , 2010. Vol. 21, no 9, 2523-2531 p.
Keyword [en]
conductive fibres, smart textiles, surface coating
Keyword [sv]
Energi och material
National Category
Polymer Chemistry Materials Engineering
Identifiers
URN: urn:nbn:se:hb:diva-3006DOI: 10.1007/s10856-010-4110-9Local ID: 2320/7423OAI: oai:DiVA.org:hb-3006DiVA: diva2:871101
Available from: 2015-11-13 Created: 2015-11-13

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Skrifvars, Mikael
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CiteExportLink to record
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