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Porous Open-Сell UHMWPE: Experimental Study of Structure and Mechanical Properties

1
Center for Energy Science and Technology, Skoltech, Moscow 121205, Russia
2
Institute of Physiologically Active Substances, RAS, Сhernogolovka 142432, Russia
3
Center of Composite Materials, National University of Science and Technology “MISiS”, Moscow 119091, Russia
4
Center for Design, Manufacturing and Materials, Skoltech, Moscow 121205, Russia
5
Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK
*
Author to whom correspondence should be addressed.
Materials 2019, 12(13), 2195; https://doi.org/10.3390/ma12132195
Received: 28 May 2019 / Revised: 24 June 2019 / Accepted: 3 July 2019 / Published: 8 July 2019
(This article belongs to the Special Issue Bone Biomaterials)
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Abstract

Ultra-high molecular weight polyethylene (UHMWPE) is a bioinert polymer that is widely used as bulk material in reconstructive surgery for structural replacements of bone and cartilage. Porous UHMWPE can be used for trabecular bone tissue replacement, and it can be used in living cell studies as bioinert 3D substrate permeable to physiological fluids. It is important to develop techniques to govern the morphology of open-cell porous UHMWPE structures (pore size, shape, and connectivity), since this allows control over proliferation and differentiation in living cell populations. We report experimental results on the mechanical behavior of porous open-cell UHMWPE obtained through sacrificial removal (desalination) of hot-molded UHMWPE-NaCl powder mixtures with pore sizes in the range 75 µm to 500 µm. The structures were characterized using SEM and mechanically tested under static compression and dynamic mechanical analysis (DMA), bending, and tensile tests. Apparent elastic modulus and complex modulus were in the range of 1.2 to 2.5 MPa showing a weak dependence on cell size. Densification under compression caused the apparent elastic modulus to increase to 130 MPa. View Full-Text
Keywords: porous UHMWPE; mechanical properties; DMA porous UHMWPE; mechanical properties; DMA
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Salimon, A.I.; Statnik, E.S.; Zadorozhnyy, M.Y.; Senatov, F.S.; Zherebtsov, D.D.; Safonov, A.A.; Korsunsky, A.M. Porous Open-Сell UHMWPE: Experimental Study of Structure and Mechanical Properties. Materials 2019, 12, 2195.

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