For the purpose of using organic polymeric materials for electrical insulation, various additives such as antioxidants are added to prevent degradation or oxidative decomposition of the polymers. Therefore, it is desirable that we can identify antioxidants added in polymers by instrument analyses. In this research, terahertz absorption spectroscopy was conducted for nine kinds of antioxidants. The spectroscopy was also conducted for sheets of low-density polyethylene, to which each antioxidant had been added with different contents. As a result, it has become clear that each antioxidant has its own specific spectrum. In addition, for most antioxidants, the absorption intensity is proportional to the content of antioxidant added in LDPE. However, several absorption peaks change their spectral shapes when the antioxidant is in LDPE.

为了使用有机聚合物材料进行电绝缘，添加了各种添加剂，例如抗氧化剂，以防止聚合物降解或氧化分解。因此，我们希望能够通过仪器分析鉴定添加在聚合物中的抗氧化剂。在这项研究中，太赫兹吸收光谱法用于九种抗氧化剂。还对低密度聚乙烯片材进行了光谱分析，其中向每种抗氧化剂添加了不同含量的抗氧化剂。结果，已经清楚每种抗氧化剂具有其自己的特定光谱。此外，对于大多数抗氧化剂，吸收强度与LDPE中添加的抗氧化剂含量成正比。但是，当抗氧化剂为LDPE时，几个吸收峰会改变其光谱形状。