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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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Arbeiter, Daniela
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Topics
Publications (12/12 displayed)
- 2022Design study of dynamic mechanical test bench specimen grips
- 2022Evaluation of a nonlinear viscoelastic-plastic constitutive model in numerical simulation of thermoplastic polymers for stent applicationcitations
- 2022Thermal annealing of injection molded VHMW PLLAcitations
- 2022The influence of PEGDA’s molecular weight on its mechanical properties in the context of biomedical applicationscitations
- 2021Polymer selection for Eustachian tube stent application based on mechanical, thermal and degradation behavior
- 2021Fiber composite materials via coaxial, dual or blend electrospinningcitations
- 2021Definition of test parameters for dynamic mechanical testing of polymeric implant materialscitations
- 2020Investigating dynamic-mechanical properties of multi-layered materials for biomedical applicationscitations
- 2019Thermomechanical properties of PEGDA in combination with different photo-curable comonomerscitations
- 2019Controlled biodegradation of metallic biomaterials by plasma polymer coatings using hexamethyldisiloxane and allylamine monomerscitations
- 2018Thermomechanical properties of PEGDA and its co-polymerscitations
- 2017Influence of bulk incorporation of FDAc and PTX on polymer propertiescitations
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article
Thermal annealing of injection molded VHMW PLLA
Abstract
<jats:title>Abstract</jats:title><jats:p>In this study, DSC experiments were used to elaborate an annealing protocol for injection molded very high molecular weight (VHMW) PLLA with two molecular masses, 320,000 g/mol and 700,000 g/mol. The initial material obtained from the injection molding process was found to be highly amorphous and not in thermodynamic equilibrium state, as distinct cold crystallization and enthalpy relaxation were observed in DSC data. Thermal annealing to 85 °C for 60 - 90 min under controlled conditions using a DSC device showed to be sufficient to stabilize the polymer and increase the crystallinity to up to 50 %. Annealing did not result in any signs of thermal decomposition. The elaborated thermal treatment has been transferred to manual annealing of large specimen geometries for subsequent DMA analysis.</jats:p>