Terahertz absorption spectra of antioxidants in insulating polymers

Abstract

Terahertz absorption spectra were measured for nine kinds of antioxidants. The spectra were also measured for low-density polyethylene sheets that contain each antioxidant with different contents. As a result, a fingerprint spectrum appears for each antioxidant, from which the antioxidants become distinguishable and their contents can be estimated.