摘要:
A polyethylene powder is described having a molecular weight in the range of from 3,000,000 g/mol to less than 4,000,000 g/mol as determined by ASTM 4020 and a bulk density of 0.10 to 0.20 g/cm 3 . On sintering, the polyethylene powder produces a porous article having an elastic modulus of at least 90 MPa.
摘要:
In a process for producing high molecular weight polyethylene, ethylene is contacted with a slurry of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand under polymerization conditions comprising a temperature of about 20 °C to less than 90 °C and a pressure of about 4 bar to about 40 bar.
摘要:
A shaped article, suitable for in a prosthetic device, is formed of polyethylene having a molecular weight of at least 3 x 105 g/mol as determined by ASTM 4020, and has a yield strength greater than 20 as determined by DIN EN ISO 527. The polyethylene is produced by polymerizing ethylene in the presence of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand.
摘要翻译:适用于假体装置中的成型制品由聚乙烯形成,所述聚乙烯具有通过ASTM 4020测定的至少3×10 5 g / mol的分子量,并且具有大于20的屈服强度 如DIN EN ISO 527所测定的。聚乙烯是通过在包含酚盐醚配体的第4族金属配合物的催化剂组合物存在下使乙烯聚合而制得的。 p>
摘要:
A polyethylene powder has a molecular weight in the range of about 300,000 g/mol to about 2,000,000 g/mol as determined by ASTM-D 4020, an average particle size, D 50 , between about 300 and about 1500 μm, and a bulk density between about 0.25 and about 0.5 g/ml. On sintering, the polyethylene powder produces a porous article having a porosity of at least 45% and a pressure drop less than 5 mbar. The porous article is useful in, for example, wastewater aeration and capillary and filtration applications.
摘要:
Ultra-high molecular weight polyethylene has a molecular weight greater than 20 x 106 gm/mol as determined by ASTM 4020 or by size exclusion chromatography (SEC) and is produced by polymerizing ethylene with a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand.
摘要:
In a process for producing an elongated polyethylene component, such as a fiber or membrane, polyethylene powder having a molecular weight of at least 3 x 10 5 g/mol as determined by ASTM 4020 is dissolved in a solvent to produce an extrudable solution. The solution is then extruded through a die to form an elongated component and at least part of said solvent is removed from the elongated component. The polyethylene powder used in the process is produced by polymerizing ethylene in the presence of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand.
摘要:
Disclosed are filters, smoking devices, related articles and apparatus, and related methods. The filters include porous masses that have an active particle and a binder particle, wherein the active particle comprises carbon and the porous mass has a carbon loading of at least about 6 rag/mm and an encapsulated pressure drop of about 20 mm of water or less per mm of porous mass.
摘要:
Disclosed are filters, smoking devices, related articles and apparatus, and related methods. The filters have porous masses, the porous masses having an active particle and a binder particle, wherein the active particle includes an element selected from the group consisting of: a nano-scaled carbon particle, a carbon nanotube having at least one wall, a carbon nanohoro, a bamboo-like carbon nanostructure, a fullerene, a fullerene aggregate, graphene, a few layer graphene, oxidized graphene, a iron oxide nanoparticle, a nanoparticle, a metal nanoparticle, a gold nanoparticle, a silver nanoparticle, a metal oxide nanoparticle, an alumina nanoparticle, a magnetic nanoparticle, a paramagnetic nanoparticle, a superparamagnetic nanoparticle, a gadolinium oxide nanoparticle, a hematite nanoparticle, a magnetite nanoparticle, a gado-nanotube, an en do fullerene, Gd@C60, a core-shell nanoparticle, an onionated nanoparticle, a nanosheli, an onionated iron oxide nanoparticle, and any combination thereof.
摘要:
A shaped article, suitable for in a prosthetic device, is formed of polyethylene having a molecular weight of at least 3 x 105 g/mol as determined by ASTM 4020, and has a yield strength greater than 20 as determined by DIN EN ISO 527. The polyethylene is produced by polymerizing ethylene in the presence of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand.
摘要翻译:适合于假体装置的成型制品由通过ASTM 4020确定的分子量至少为3×105g / mol的聚乙烯形成,并且通过DIN EN ISO 527确定的屈服强度大于20。 聚乙烯通过在包含酚盐醚配体的第4族金属络合物的催化剂组合物的存在下聚合乙烯来制备。
摘要:
In a process for producing high molecular weight polyethylene, ethylene is contacted with a slurry of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand under polymerization conditions comprising a temperature of about 20 °C to less than 90 °C and a pressure of about 4 bar to about 40 bar.