Studies on electron-beam irradiation and plastic deformation of medical-grade ultra-high molecular weight polyethylene

Czaja, Krystyna; Sudoł, M.

doi:10.1016/j.radphyschem.2010.11.008

Cited by 13 publications

(10 citation statements)

References 59 publications

(71 reference statements)

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“…The bands associated with end-vinyl groups (1642, 990, 909 cm À1 ) notably reduced, while the new trans-vinylene band at 965 cm À1 , absent in the neat polymer, developed in the crosslinked samples. Such changes are typical for polyethylene crosslinked by irradiation [31,55,56].…”

Section: Changes In Molecular Network Due To Deformationmentioning

confidence: 82%

Erosion of the molecular network in the amorphous layers of polyethylene upon high- strain deformation

Bartczak

Grala

Richaud

et al. 2016

Polymer

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Samples of linear polyethylene, neat and crosslinked by irradiation with electron beam, were subjected to heavy plastic deformation by plane-strain compression up to the true strain exceeding 2 (deformation ratio l > 8) at room temperature. Structural studies of deformed samples and investigation of long-term strain recovery demonstrated that the deformation of the neat, non-crosslinked HDPE is completely reversible above the melting point of the crystalline phase, provided that the applied true strain does not exceed e ¼ 1.0 (l ¼ 2.7). At higher applied strains, e > 1, an irreversible deformation component emerged gradually, and at e ¼ 2.1 (l ¼ 8.2), the permanent, truly irreversible, residual strain was approx. e res ¼ 0.36 (l ¼ 1.4). In contrast, samples of crosslinked HDPE above T m exhibited complete reversibility of deformation, irrespectively of an applied strain, and e res z 0. The source of permanent irreversible strain component in neat HDPE is a deformation-induced partial destruction of the molecular network of entangled chains within amorphous interlamellar layers. The principal mechanism found was chain disentanglement, which was supplemented by a very limited chain scission. In the case of crosslinked materials, the dense and relatively homogeneous molecular network appeared robust enough to avoid any damage. Consequently, the strain appeared here fully reversible upon melting of crystalline phase.

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Section: Changes In Molecular Network Due To Deformationmentioning

confidence: 82%

Erosion of the molecular network in the amorphous layers of polyethylene upon high- strain deformation

Bartczak

Grala

Richaud

et al. 2016

Polymer

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“…Common surface modification techniques include treatment by flame, corona, plasma, photons, electron beams, ion beams, X-rays, and gamma-rays. In the past decades, surface treatment of polymers with non-thermal plasmas has been extensively studied [6][7][8], and it has become evident that this approach is promising also for biomedical polymers [9,10]. Surface modification by different plasma precursors including oxygen [6], ammonia [11], and air [12] can also promote cell adhesion on polymer surfaces because of the presence of polar surface functionalities.…”

Section: Introductionmentioning

confidence: 99%

“…Due to ablation surface topography of polymer is affected [22,23]. Further, ultra-high molecular weight polyethylene (UHMWPE) has been used for the acetabular cup in total hip replacement and for the components of other total joint replacements since the 1960s [8,24].…”

Section: Introductionmentioning

confidence: 99%

Enhanced adherence of mouse fibroblast and vascular cells to plasma modified polyethylene

Řezníčková

Novotná

Kolská

et al. 2015

Materials Science and Engineering: C

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“…Fourier transform infrared (FTIR) spectroscopy: The FTIR spectra were collected with an ATI Mattson Infinity FTIR 60 infrared spectrometer (Mattson Instruments, Inc., Madison, WI, USA) (32 scans, resolution = 2 cm −1 ) at several locations for each specimen. The averaging, corrections, and normalization of the spectra were performed according to the procedure described in ref 24…”

Section: Methodsmentioning

confidence: 99%

Properties of ultra‐high‐molecular‐weight polyethylene with a structure modified by plastic deformation and electron‐beam irradiation

Cybo

Maszybrocka

Duda

et al. 2012

J of Applied Polymer Sci

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To improve the functional properties of polyethylene in a polymer-metal kinematic system, ultrahigh-molecular-weight polyethylene (UHMWPE) was subjected to light deformation by uniaxial compression [permanent true strain (e f ) ¼ 0.14-0.32] and postdeformation electron-beam irradiation (with a dose of 26-52 kGy). X-ray examinations demonstrated that no significant reorientation of the lamellar structure occurred upon compression. The textures of all of the samples, except for the sample deformed at e f ¼ 0.32, were nearly random. In the exception, a very weak axial texture developed. However, the treatment applied (deformation and electron-beam irradiation) significantly changed the structure of the material. A considerable increase in the crosslinked fraction and the crystalline band absorption in the Fourier transform infrared spectra were observed in the modified samples. This indicated a noticeable increase in the degree of spatial ordering within a structure, although the overall crystallinity increased only slightly. The effect of such restructuring was evidenced by microscopic observations of the near-surface layer of the UHMWPE samples subjected to unidirectional sliding interaction with a CoCr alloy for 100 h (in a block-ring tribological system). It was found that for the predeformed (e f ¼ 0.14-0.21) and electron-irradiated (dose of 52 kGy) samples, the operational load imposed on the system resulted in a considerable reduction in the thickness of the plastically deformed near-surface layer and in a decreasing amount of lamellae oriented flat-on compared to the neat unmodified UHMWPE subjected to the same test. The recorded tribological wear (mass decrement) decreased up to fivefold in comparison to that of the initial material.

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Studies on electron-beam irradiation and plastic deformation of medical-grade ultra-high molecular weight polyethylene

Cited by 13 publications

References 59 publications

Erosion of the molecular network in the amorphous layers of polyethylene upon high- strain deformation

Erosion of the molecular network in the amorphous layers of polyethylene upon high- strain deformation

Enhanced adherence of mouse fibroblast and vascular cells to plasma modified polyethylene

Properties of ultra‐high‐molecular‐weight polyethylene with a structure modified by plastic deformation and electron‐beam irradiation

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