Microstructure, thermooxidation and mechanical behavior of a novel highly linear, vitamin E stabilized, UHMWPE
| Autor: | J. A. Puértolas, F.J. Pascual, Francisco J. Medel, Pablo J. Alonso, M. J. Martínez-Morlanes, Javier Rubín |
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| Přispěvatelé: | Comisión Interministerial de Ciencia y Tecnología, CICYT (España), Ministerio de Ciencia e Innovación (España) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Thermogravimetric analysis
Materials science Free Radicals Acrylic Resins Bioengineering Biomaterials chemistry.chemical_compound Crystallinity Differential scanning calorimetry Microscopy Electron Transmission X-Ray Diffraction Elastic Modulus Tensile Strength Transition Temperature Vitamin E Irradiation Composite material Elastic modulus Calorimetry Differential Scanning Electron Spin Resonance Spectroscopy Polyethylene Microstructure Thermogravimetry chemistry Gamma Rays Mechanics of Materials Stress Mechanical Polyethylenes Oxidation-Reduction |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 0928-4931 |
| Popis: | A novel, vitamin E-stabilized, medical grade ultra-high molecular polyethylene, MG003 (DSM Biomedical; The Netherlands), has been very recently introduced for use in total joint replacements. This homopolymer resin features average molecular weight similar to that of conventional GUR 1050 resin (5.5-6*10 6 g/mol), but a higher degree of linearity. The aim of this study was to characterize the microstructure, thermal and thermooxidation properties as well as the mechanical behavior of this novel MG003 resin before and after gamma irradiation in air to 90 kGy. For this purpose, a combination of experimental techniques were performed including differential scanning calorimetry (DSC), thermogravimetry (TG), transmission electron microscopy (TEM), X-Ray Diffraction, electron paramagnetic resonance (EPR), and uniaxial tensile tests. As-consolidated MG003 materials exhibited higher crystalline contents (~ 62%), transition temperatures (~ 140 °C), crystal thickness (~ 36 nm), yield stress (~ 25 MPa) and elastic modulus (~ 400 MPa) than GUR 1050 controls (55%, 136 °C, 27 nm, 19 MPa, and 353 MPa, respectively). Irradiation produced similar changes in both MG003 and GUR 1050 materials, specifically increased crystallinity (63% and 60%, respectively), crystal thickness (39 nm and 30 nm), yield stress (27 MPa and 21 MPa), but, above of all, loss of elongation to breakage (down to 442 and 469%, respectively). Thermogravimetric and EPR results suggest comparable susceptibilities to oxidation for both MG003 and GUR 1050 polyethylenes. Based on the present findings, MG003 appears as a promising alternative medical grade polyethylene and it may satisfactorily contribute to the performance of total joint replacements. © 2012 Elsevier B.V. Research funded by the Comisión Interministerial de Ciencia y Tecnología (CICYT), Spain. Project: MAT 2010-16175 and Consolider-Ingenio CDS2008-0023 from the Ministerio de Ciencia e Innovación. |
| Databáze: | OpenAIRE |
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