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首页> 外文期刊>Journal of Applied Polymer Science >Modeling the oxidative degradation of ultra-high-molecular-weight polyethylene
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Modeling the oxidative degradation of ultra-high-molecular-weight polyethylene

机译：模拟超高分子量聚乙烯的氧化降解

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Understanding the sequence of reactions that occur in ultra-high-molecular-weight polyethylene (UHMWPE) following Co-60 gamma irradiation has been the focus of numerous experimental studies. In the study reported here, we have incorporated recent experimental findings into a mathematical model for UHMWPE oxidation. Simulation results for shelf aging and accelerated aging are presented. It is shown that very reasonable simulations of shelfaging and accelerated-aging data can be obtained. It is also shown that simulations of shelf aging in reduced oxygen environments predict that the subsurface peaks of ketones will be shifted to the exterior surface. In vivo aging can be simulated if we assume that the oxygen level in the synovial fluid is about one-eighth that of atmospheric levels. Some reduced irradiation doses are predicted to significantly reduce the ketone formation for shelf-aging periods of up to 10 years. (C) 2002 Wiley Periodicals, Inc. [References: 34]
机译：了解Co-60γ辐照后超高分子量聚乙烯（UHMWPE）中发生的反应顺序已成为众多实验研究的重点。在这里报道的研究中，我们将最近的实验结果纳入了UHMWPE氧化的数学模型。给出了货架老化和加速老化的仿真结果。结果表明，可以获得非常合理的货架数据和加速老化数据的模拟。还显示出在还原的氧气环境中的货架老化的模拟预测，酮的表面下峰将移至外表面。如果我们假设滑液中的氧气水平约为大气水平的八分之一，则可以模拟体内衰老。预计某些减少的辐照剂量可在长达10年的货架期中显着减少酮的形成。 （C）2002 Wiley Periodicals，Inc. [参考：34]

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