| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Fuenmayor, Evert
Technological University of the Shannon: Midlands Midwest
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Material compatibility and processing challenges in droplet deposition modelling additive manufacturingcitations
- 2024Material compatibility and processing challenges in droplet deposition modelling additive manufacturing: A study on pharmaceutical excipients Polyvinylpyrrolidone/vinyl acetate (PVP/VA) and Polycaprolactone (PCL)citations
- 2022Heat dissipation plays critical role for longevity of polymer-based 3D-printed inserts for plastics injection moulding.citations
- 2021Stereolithography (SLA) utilised to print injection mould tooling in order to evaluate thermal and mechanical properties of commercial polypropylenecitations
- 2019Comparison of fused-filament fabrication to direct compression and injection molding in the manufacture of oral tabletscitations
- 2019Influence of annealing and biaxial expansion on the properties of Poly-l-lactic) medical tubing.citations
- 2019Additive Manufacturing of Personalized Pharmaceutical Dosage Forms via Stereolithographycitations
- 2019Additive manufacturing of PLA/HNT nanocomposites for biomedical applicationscitations
- 2019Influence of Annealing and Biaxial Expansion on the Properties of Poly(l-Lactic Acid) Medical Tubingcitations
- 2019Influence of annealing and biaxial expansion on the properties of poly(l-lactic acid) medical tubingcitations
- 2018Material considerations for fused-filament fabrication of solid dosage forms.citations
- 2018Material considerations for fused-filament fabrication of solid dosage formscitations
Places of action
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article
Influence of annealing and biaxial expansion on the properties of poly(l-lactic acid) medical tubing
Abstract
<p>Poly-l-lactic acid (PLLA) is one of the most common bioabsorbable materials in the medical device field. However, its use in load-bearing applications is limited due to its inferior mechanical properties when compared to many of the competing metal-based permanent and bioabsorbable materials. The objective of this study was to directly compare the influence of both annealing and biaxial expansion processes to improve the material properties of PLLA. Results showed that both annealing and biaxial expansion led to an overall increase in crystallinity and that the crystallites formed during both processes were in the α' and α forms. 2D-WAXS patterns showed that the preferred orientation of crystallites formed during annealing was parallel to the circumferential direction. While biaxial expansion resulted in orientation in both axial and circumferential directions, with relatively equal sized crystals in both directions, Da (112 Å) and Dc (97 Å). The expansion process had the most profound effect on mechanical performance, with a 65% increase in Young's modulus, a 45% increase in maximum tensile stress and an 18-fold increase in strain at maximum load. These results indicate that biaxially expanding PLLA at a temperature above T<sub>cc</sub> is possible, due to the high strain rates associated with stretch blow moulding.</p>