Results 251 to 260 of about 61,598 (297)

Cross-Linked Polyethylene for Higher Voltages

IEEE Transactions on Power Apparatus and Systems, 1967
The rapid evolution of cross-linked polyethylene for high-voltage cable applications and the factors which promoted this development are discussed in relation to the growing demand for solid-dielectric constructions. Advances in cable design and technology are outlined for this thermally-stable insulation, highlighting the technical advantages of ...
A. McKean, F. Oliver, S. Trill
openaire   +1 more source

Thermal aging of cross-linked polyethylene

Annales de Chimie Science des Matériaux, 2006
L'effet du vieillissement thermique sur les proprietes mecaniques du polyethylene reticule chimiquement (PRC), utilise dans l'isolation des câbles de haute tension, a ete etudie. Nous avons montre que l'allongement a la rupture et la resistance a la traction du polymere diminuent en fonction du temps de vieillissement.
Larbi Boukezzi, Mohammed Nedjar, Leila Mokhnache, Mohammed Lallouani, Ahmed Boubakeur   +4 more
openaire   +1 more source

Kinetics of solidification of cross-linked polyethylene

Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1982, 1982
In the production of extruded dielectric cables the molten polymer is invariably quenched following extrusion. During this process crystallization of the polymer occurs at a series of different temperatures depending on the thermal conductivity of the polymer in question.
Y.-H. Kao, H.-T. Tseng, P. J. Phillips
openaire   +1 more source

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

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

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
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Highly Cross-Linked Polyethylenes

2011
Osteolysis after total joint replacement using ultra-high molecular weight Polyethylene bearing components has been shown to be a major factor for the long-term failure of such components. Highly cross-linked polyethylene has already been introduced in the late 1970s and demonstrated to have superior wear resistance compared to non-irradiated and ...
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