Results 211 to 220 of about 56,828 (256)

Multiple morphologies in cross-linked polyethylene

Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1980, 1980
Here, a radial section of an uncross-linked miniature extruded cable was studied, the cable having been polished and cut in half, and then each half treated with one etchant. Both etchants revealed the spherulitic structure (Figure 1), much greater penetration having occurred in the case of the permanganic etchant.
D. V. Brower, K. L. Naylor, P. J. Phillips   +2 more
openaire   +1 more source

Review on Recycling of Cross-Linked Polyethylene

Industrial & Engineering Chemistry Research
Cross-linked polyethylene is one of the most widely used thermosetting plastics. Due to its low cost, lightweight, and exceptional insulation properties against electricity and heat, it is frequently used as an insulation material for wires and cables.
Minu Selvin, Sagar Shah, Hanna J. Maria, Sabu Thomas, Rabin Tuladhar, Mohan Jacob   +5 more
openaire   +2 more sources

Hardness and creep of cross-linked polyethylene

Polymer, 1989
Abstract Vickers microhardness, tensile and compression tests and creep experiments have been performed at 22°C on electron beam irradiated high density polyethylene (HDPE). The microhardness and compression strengths were found to increase progressively with increasing dose in the range 0-500 kGy but the tensile strength was relatively constant. The
P.J. Henderson, A.J. Wallace
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Electrochemical treeing at contaminants in polyethylene and cross-linked polyethylene insulation

Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1973, 1973
A hypothesis is presented which may be stated as follows: “In cables, the inception of electrochemical trees at the site of contaminants, is independent of the nature of the contaminants; it is a consequence of the presence of gaps or weak boundary layers at the contaminant-insulation interface, where liquid can collect; certain liquids, under the ...
C. Katz, B. S. Bernstein
openaire   +1 more source

Comparison of Cross-Linked Polyethylene Materials for Orthopaedic Applications

Clinical Orthopaedics and Related Research, 2003
Cross-linked polyethylenes are being marketed by orthopaedic manufacturers to address the problem of osteolysis caused by polyethylene particulate wear debris. Wear testing of these cross-linked polyethylenes in hip simulators has shown dramatic reduction in wear rate compared with standard ultrahigh molecular weight polyethylene, either gamma ...
John P, Collier, Barbara H, Currier, Francis E, Kennedy, John H, Currier, Graham S, Timmins, Simon K, Jackson, Robin L, Brewer   +6 more
openaire   +2 more sources

Fracture of a Cross-Linked Polyethylene Liner Due to Impingement

The Journal of Arthroplasty, 2009
We report a case of fracture at 2 years after implantation of a 50-kGy moderately cross-linked ultrahigh molecular weight polyethylene liner with an extended lip (Marathon, DePuy, Warsaw, IN). The extended lip section had fractured. The liner showed no oxidation.
Gavan P, Duffy, Keith K, Wannomae, Shannon L, Rowell, Orhun K, Muratoglu   +3 more
openaire   +2 more sources

SHORT-TERM IN VIVO WEAR OF CROSS-LINKED POLYETHYLENE

The Journal of Bone and Joint Surgery-American Volume, 2004
Cross-linked polyethylene was developed to reduce volumetric wear in prosthetic joints. Hip simulator studies have shown promising results with regard to wear reduction. This study evaluated the short-term in vivo wear of a moderately cross-linked polyethylene.Linear head penetration, as an assessment of in vivo polyethylene wear, was measured in two ...
Christian, Heisel, Mauricio, Silva, Mylene A, dela Rosa, Thomas P, Schmalzried   +3 more
openaire   +2 more sources

History of the Irradiation Cross-Linking of Polyethylene

Journal of Macromolecular Science: Part A - Chemistry, 1981
Abstract The formation of covalent C-C bonds or cross-links between the long chains in polyethylene (PE) by means of high energy irradiation was first deduced from changes in the stress-strain curves of the PE samples after irradiations in vacuo in the heavy water pile of the Argonne National Laboratory near Chicago in the academic year 1947-48.
openaire   +1 more source

Etching and the Morphology of Cross-Linked Polyethylene Cable Insulation

IEEE Transactions on Electrical Insulation, 1983
The techniques of etching by carbon tetrachloride vapor and by permanganic acid are shown to be prone to artifacts, and so earlier conclusions based on these techniques, i.e. that XLPE cable insulation has a large scale (>> 10 ?m) spherulitic texture structure, need to be reexamined. A comparison with XLPE film samples, where spherulite size is readily
Bamji, S. S., Bulinski, A. T., Densley, R. J., Garton, A.   +3 more
openaire   +1 more source

Highly Cross-linked Polyethylene in Total Hip Arthroplasty

Journal of the American Academy of Orthopaedic Surgeons, 2006
Although total hip arthroplasty is a common and highly successful procedure, its long-term durability has been undermined by the cellular response to polyethylene wear debris and the subsequent effects on periprosthetic bone. Research elucidating the effects of sterilization on polyethylene wear has facilitated the development of a more wear-resistant ...
Alexander C, Gordon, Darryl D, D'Lima, Clifford W, Colwell   +2 more
openaire   +2 more sources