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高压结晶含维生素E的超高分子量聚乙烯耐磨性和疲劳断裂抗性的提高

Improved resistance to wear and fatigue fracture in high pressure crystallized vitamin E-containing ultra-high molecular weight polyethylene.

作者信息

Oral Ebru, Godleski Beckos Christine A, Lozynsky Andrew J, Malhi Arnaz S, Muratoglu Orhun K

机构信息

Massachusetts General Hospital, Department of Orthopaedic Surgery, Boston, MA 02114, USA.

出版信息

Biomaterials. 2009 Apr;30(10):1870-80. doi: 10.1016/j.biomaterials.2008.12.029. Epub 2009 Jan 8.

DOI:10.1016/j.biomaterials.2008.12.029
PMID:19135247
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3747844/
Abstract

Higher crystallinity and extended chain morphology are induced in ultra-high molecular weight polyethylene (UHMWPE) in the hexagonal phase at temperatures and pressures above the triple point, resulting in improved mechanical properties. In this study, we report the effects of the presence of a plasticizing agent, namely vitamin E (alpha-tocopherol), in UHMWPE during high pressure crystallization. We found that this new vitamin E-blended and high pressure crystallized UHMWPE (VEHPE) has improved fatigue strength and wear resistance compared to virgin high pressure crystallized (HP) UHMWPE. This suggested different mechanisms of wear reduction and fatigue crack propagation resistance in UHMWPE.

摘要

在高于三相点的温度和压力下，超高分子量聚乙烯（UHMWPE）在六方相中会形成更高的结晶度和伸展链形态，从而改善机械性能。在本研究中，我们报告了在超高分子量聚乙烯高压结晶过程中，增塑剂维生素E（α-生育酚）的存在所产生的影响。我们发现，与原始高压结晶（HP）超高分子量聚乙烯相比，这种新型的维生素E共混高压结晶超高分子量聚乙烯（VEHPE）具有更高的疲劳强度和耐磨性。这表明超高分子量聚乙烯在减少磨损和抗疲劳裂纹扩展方面存在不同的机制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2bea/3747844/69b0ffff629b/nihms-497233-f0015.jpg
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