Results 171 to 180 of about 15,988 (210)
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Melt miscibility of HDPE/UHMWPE, LDPE/UHMWPE, and LLDPE/UHMWPE blends detected by dynamic rheometer
Polymer Science Series A, 2014The dynamic rheological behavior of high density polyethylene (HDPE)/ultrahigh molecular weight polyethylene (UHMWPE) blends, low density polyethylene (LDPE)/UHMWPE blends and linear low density polyethylene (LLDPE)/ UHMWPE blends was measured in parallel plate rheometer at 200°C.
Yang Chen, Huawei Zou, Ya Cao, Mei Liang
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Catalysts for UHMWPE and UHMWPE-copolymers
Inorganica Chimica Acta, 2010Abstract Classic inorganic and more recent organometallic compounds capable of polymerizing ethylene to ultra high molecular are compared. Activated catalysts showed varying degrees of productivity when challenged with co-monomers. The general activity trend followed TiCl 3 3 N -(3,5-diiodosalicylidene)cycloheptylamine titanium dichloride was ...
Robert L. Jones +5 more
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Oxidation of orthopaedic UHMWPE
Biomaterials, 2002Retrieved EtO sterilised acetabular cups usually show much less degradation than gamma-ray sterilised cups. Some of our retrieved EtO sterilised cups did, however, reveal unexpected bulk oxidation. It was observed that this oxidation was always accompanied by whitening of the material. This whitening was found to be due to a break-up of the compression
COSTA, Luigi +3 more
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Macromolecular Symposia, 2009
AbstractPolyolefin coordination catalysts useful for producing UHMWPE are surveyed, including classic Ziegler‐Natta (ZN), current commercial generation ZN, metallocene single site, and non‐metallocene. Catalysts were prepared and compared for productivity and selected polymer properties under a variety of conditions.
R.L. Jones, M. Armoush
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AbstractPolyolefin coordination catalysts useful for producing UHMWPE are surveyed, including classic Ziegler‐Natta (ZN), current commercial generation ZN, metallocene single site, and non‐metallocene. Catalysts were prepared and compared for productivity and selected polymer properties under a variety of conditions.
R.L. Jones, M. Armoush
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Modeling UHMWPE wear debris generation
Journal of Biomedical Materials Research Part B: Applied Biomaterials, 2006AbstractIt is widely recognized that polyethylene wear debris is one of the main causes of long‐term prosthesis loosening. The noxious bioreactivity associated with this debris is determined by its size, shape, and quantity. The aim of this study was to develop a numerical tool that can be used to investigate the primary polyethylene wear mechanisms ...
H, Baudriller, P, Chabrand, D, Moukoko
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Mechanical and tribological properties of short discontinuous UHMWPE fiber reinforced UHMWPE
Polymer Bulletin, 1997The tribological properties of Ultra-High Molecular Weight Polyethylene have generated new concern regarding the long-term clinical performance of total joint replacements. To extend the lifetime of artificial joints, it is necessary to decrease the wear rate of UHMWPE. One possible solution is the incorporation of UHMWPE fibers.
Hofste, JM, vanVoorn, B, Pennings, AJ
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Vitamin-E-Blended UHMWPE Biomaterials
2009This chapter traces the scientific foundation for the acceptance of vitamin-E-blended UHMWPE biomaterials and summarizes the development of ideas that led to the commercialization of vitamin-E-blended UHMWPE for use in orthopedics. UHMWPE blended with vitamin E has emerged as a new biomaterial for use in orthopedic implants.
Kurtz S., Bracco P., Costa L.
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Journal of Thermal Analysis, 1997
The thermal behaviour of ultra-high molecular weight polyethylene (UHMWPE) of different molecular weights was examined by thermal analysis methods. The melting temperatureTm and the heat of melting δH were measured by the DSC method. The thermooxidative degradation process was investigated by using a MOM Q-1500 D derivatograph at various heating rates ...
E. Rudnik, Z. Dobkowski
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The thermal behaviour of ultra-high molecular weight polyethylene (UHMWPE) of different molecular weights was examined by thermal analysis methods. The melting temperatureTm and the heat of melting δH were measured by the DSC method. The thermooxidative degradation process was investigated by using a MOM Q-1500 D derivatograph at various heating rates ...
E. Rudnik, Z. Dobkowski
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Composite Structures, 2020
Abstract The ballistic performance of ultra-high molecular weight polyethylene (UHMWPE) laminated plates and UHMWPE encapsulated aluminum structures were numerically characterized. Full three-dimensional continuum model for each type of target was built, and the UHMWPE was simulated using a sub-laminate approach with a composite material model ...
Rui Zhang +6 more
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Abstract The ballistic performance of ultra-high molecular weight polyethylene (UHMWPE) laminated plates and UHMWPE encapsulated aluminum structures were numerically characterized. Full three-dimensional continuum model for each type of target was built, and the UHMWPE was simulated using a sub-laminate approach with a composite material model ...
Rui Zhang +6 more
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