Ultra High Molecular Weight Polyethylene Uhmwpe
Mostrando 1-12 de 12 artigos, teses e dissertações.
-
1. Ballistic Tests of Alumina-UHMWPE Composites Submitted to Gamma Radiation
The energy absorption in ballistic tests of alumina-ultra high molecular weight polyethylene (UHMWPE) composites with 60, 80 and 90 wt% alumina submitted to gamma radiation doses of 25, 50 and 75 kGy was investigated. The ballistic tests were carried out at subsonic speed using a compressed air system. The results showed that the composite with 80% alumina i
Mat. Res.. Publicado em: 22/08/2019
-
2. Use of Amphiphilic Composites based on Clay/Carbon Nanofibers as Fillers in UHMWPE
In this work, it is proposed a new strategy to improve the dispersion of inorganic fillers in polymeric matrices by producing surface carbon nanostructures. Clay/carbon nanofibers particles were prepared and used as fillers to improve the mechanical and thermal properties of ultra-high molecular weight polyethylene (UHMWPE). Thermogravimetry (TG), differenti
J. Braz. Chem. Soc.. Publicado em: 2018-02
-
3. Photodegradation of UHMWPE Filled with Iron Ore Fine
Ultra high molecular weight polyethylene (UHMWPE) is one of the most important engineering materials owing to outstanding properties like impact strength and abrasion resistance. However, the relatively low Young´s modulus restricts some application and the use of fillers may be a suitable way to overcome this. The fillers can influence the photo stabilizat
Mat. Res.. Publicado em: 23/01/2017
-
4. Fractografía y disipación de energía cinética en un panel balístico de cerámica/polímero sometido al impacto de un proyectil metálico
In this study we have explored the behavior and the damage mechanisms of a laminate panel composed of polymeric and ceramic materials, submitted to the impact of a metallic projectile. The design of a system with the impact side in ceramic material (SiC) was made, with a support of an ultra-high molecular weight polyethylene (UHMWPE), plaques made with 200 m
Matéria (Rio J.). Publicado em: 2013-09
-
5. Estudo do processamento de polietileno de ultra-alta massa molar(Peuamm)e polietileno glico (PEG) por moagem de alta energia
Este trabalho exploratório teve por objetivo estudar as modificações promovidas por moagem de alta energia no de polietileno de ultra-alta massa molar (PEUAMM) e sua mistura com polietileno glicol (PEG), que podem ser de interesse para auxiliar um posterior processamento do PEUAMM. As moagens foram realizadas em um moinho do tipo attritor, um tipo de moin
Publicado em: 2010
-
6. Análise do envelhecimento acelerado e da ação inibidora do ácido ascórbico na degradação oxidativa do polietileno de ultra-elevada massa molar para aplicação biomédica
Ultra-high molecular weight polyethylene (UHMWPE) is a biomaterial widely used as part of prosthesis that requires articulating surfaces for its excellent mechanical qualities such as knee endoprosthesis for its excellent mechanical qualities. Approximately one million UHMWPE components are implanted worldwide on yearly basis. Two major problems limit the UH
Publicado em: 2009
-
7. IONIZING RADIATION EFFECT STUDY BY ELECTRON BEAM ON ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE VIRGIN AND RECYCLED INDUSTRIAL / "Estudo do efeito da radiação ionizante por feixe de elétrons sobre o polietileno de ultra alto peso molecular virgem e reciclado industrial"
Ultra High Molecular Weight Polyethylene (UHMWPE) is an engineering plastic which has several applications, chiefly, in specific areas of the industry and medicine. UHMWPE can be even for other applications such as: port fenders, current guide, bucket coating, silos and gutters, plugs, pulleys and surgical prosthesis. This range of applications is due to the
Publicado em: 2006
-
8. Metodologia de ensaio para análise de desgaste em próteses de articulação temporomandibular
Patients who had suffered some kind of trauma or pathogenic disease which involves the temporomandibular joint (TMJ), where the bone reposition is not applicable may have the joint replaced by a prostheses. Different kinds of prostheses have been proposed, some of them with success. The present work has, as main objective, to develop a specific methodology t
Publicado em: 2006
-
9. Improvements of ultra-high molecular weight polyethylene mechanical properties by nitrogen plasma immersion ion implantation
Nitrogen Plasma Immersion Ion Implantation (PIII) has been used to modify the surface chemical structure of Ultra High Molecular Weight Polyethylene (UHMWPE). Grinding and polishing processes based on abrasive papers and alumina pastes have been evaluated with regard to their results on the improvement of polymer surface roughness, which has shown to be of c
Brazilian Journal of Physics. Publicado em: 2004-12
-
10. Viability of pHEMA Hydrogels as Coating in Human Synovial Joint Prosthesis
In artificial joints, the bone part is usually substituted by a metallic component with high corrosion and strength resistance while the articular cartilage is replaced by a polymer. Use of thin layer of a compliant material acting as a bearing surface in human replacement joints has recently generated considerable interest. This work analyses the coating of
Materials Research. Publicado em: 2002-10
-
11. Recobrimento de substratos rigidos com hidrogel para utilização como superficie articular
Problems concerning the repair of damaged synovial joints are very ftequent and traumatic to a great number of people. In those cases where the damage extent is very high, the articular surface is usually an ultra high molecular weight polyethylene (UHMWPE), even though it under goes severe wear when used as the cartilage counterpart in artificial joints, wh
Publicado em: 2000
-
12. Estudo da influencia de parametros de processamento na resistencia ao desgaste do polietileno de ultra alto peso molecular
The Ultra High Molecular Weight Polyethylene (UHMWPE) is the most used human artificial joint polymer. In spite of its very good wear resistance properties the lifetime of the prosthetic system is limited by its wear. In order to study how the variation of the processing conditions influences the wear resistance of the plastic, a polymer molding and a wear t
Publicado em: 1997