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首页> 外文期刊>Polymer Testing >Degradation behavior of ultra-high molecular weight polyethylene fibers under artificial accelerated weathering
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Degradation behavior of ultra-high molecular weight polyethylene fibers under artificial accelerated weathering

机译：人工加速风化下超高分子量聚乙烯纤维的降解行为

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摘要

This work aims to study the aging behavior of ultra-high molecular weight polyethylene (UHMWPE) fibers under xenon arc radiation. The correlation between structure and properties was analyzed by Fourier transform infrared spectroscopy, differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA) and small angle X-ray scattering (SAXS). Both physical and chemical aging were observed. Carbonyl compounds were generated from the chain scission after radiation. The carbonyl index linearly increased with aging time. Both DMTA and DSC revealed that the crystal defects emerged after aging. Synchrotron SAXS was employed to characterize such structure. A model based on the information derived from SAXS is proposed. The results indicate that tensile strength is strongly affected by defects.
机译：这项工作旨在研究氙弧辐射下超高分子量聚乙烯（UHMWPE）纤维的老化行为。通过傅立叶变换红外光谱，差示扫描量热法（DSC），动态机械热分析（DMTA）和小角度X射线散射（SAXS）分析了结构与性能之间的相关性。观察到物理和化学老化。辐射后断链产生羰基化合物。羰基指数随老化时间线性增加。 DMTA和DSC均表明，老化后会出现晶体缺陷。同步加速器SAXS被用来表征这种结构。提出了一种基于SAXS信息的模型。结果表明，拉伸强度受缺陷的影响很大。

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