Degradation diagnosis of ultrahigh-molecular weight polyethylene with terahertz-time-domain spectroscopy
Degradation diagnosis of ultrahigh-molecular weight polyethylene with terahertz-time-domain spectroscopy
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DOI：
10.1063/1.1827332
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发表时间：
2004-11-29
影响因子：
4
通讯作者：
Tomita, N
中科院分区：
文献类型：
--
作者：
Yamamoto, K;Yamaguchi, M;Tomita, N
利用太赫兹时域光谱技术研究了不同条件下制备的超高分子量聚乙烯（UHMWPE）样品。通过伽马辐照降解原始UHMWPE样品导致在太赫兹区域内连续吸收范围急剧增加。的吸收连续的增加被解释为起源于样品内的无定形区域的氧化。然而，对于掺杂有0.1和0.3wt%维生素E的UHMWPE样品，仅观察到伽马辐照引起的轻微THz光谱变化。该结果与早期的维生素E对UHMWPE具有抗降解作用的指示一致。目前的结果表明，太赫兹-TDS可以用于质量控制的超高分子量聚乙烯通过监测在太赫兹区域的吸收连续。(C)2004年，美国物理学会。
We investigated ultrahigh-molecular-weight-polyethylene (UHMWPE) samples prepared by various conditions with terahertz-time-domain spectroscopy (THz-TDS). Degradation of the virgin UHMWPE samples by gamma irradiation induced a drastic increase of the absorption ranging continuously over the THz region. The increase of the absorption continuum is interpreted to originate in the oxidation of the amorphous region within the sample. Only slight THz spectral changes induced by the gamma irradiation were, however, observed for the UHMWPE samples doped with 0.1 and 0.3 wt % vitamin E. This result agrees with the earlier indication that vitamin E has an antidegradation effect on UHMWPE. The present result shows that the THz-TDS can be used for the quality control of UHMWPE by monitoring the absorption continuum in the THz region. (C) 2004 American Institute of Physics.