The authors report infrared (IR) absorption measurements conductedon laboratory-aged and unaged cross-linked polyethylene (XLPE) cablesamples. Variations in the IR absorbance of the methyl group (1377 cm-1) and the carbonyl groups (~1700 cm-1) wererecorded as a function of both radial and angular coordinates for thesamples. These variations were found to be strongly correlated withoptical birefringence measurements made on the same samples.Morphological parameters and IR absorption differ in regions containingresidual stresses compared to unstressed regions, in both aged andunaged cables. It is believed that these variations originate fromnonuniform mechanical and thermal stresses during manufacturing
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机译：作者报告了进行的红外（IR）吸收测量
在实验室老化和未老化的交联聚乙烯（XLPE）电缆上
样品。甲基的红外吸收率变化（1377 cm
-1 ）和羰基（〜1700 cm -1 ）是
记录为径向和角坐标的函数
样品。发现这些变化与
在相同样品上进行光学双折射测量。
形态参数和IR吸收在以下区域有所不同
与无应力区域相比，在老龄化和老龄化中的残余应力
未老化的电缆。据信，这些变化源于
制造过程中不均匀的机械应力和热应力
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