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Preparation of ultra high molecular weight polyethylene morphologies of totally fused particles with superior mechanical performance
Preparation of ultra high molecular weight polyethylene morphologies of totally fused particles with superior mechanical performance
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机译:具有优异机械性能的全熔融颗粒超高分子量聚乙烯形态的制备
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摘要
An isotropic semicrystalline morphology of ultra-high- molecular-weight polyethylene and a method of making it. An original powder stock or a partially fused, melt-crystallized stock having a granular memory, is heated to a temperature at which the stock fuses completely to form a homogeneous melt which loses memory of the granular structure of the original stock. The resultant melt is cooled to ambient temperatures under compression to provide a novel homogeneous isotropic semicrystalline morphology. An anisotropic morphology of ultra-high- molecular-weight polyethylene may then be made by solid-state deforming that semicrystalline morphology at a temperature near but below its crystalline melting point at a deformation ratio of about 5 to 8.
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