Far-infrared Spectroscopic Identification of Seven Kinds of Antioxidants in Polymeric Insulation

We added each of seven different kinds of anti- oxidants to a low-density polyethylene sheet and measured their Fourier-transform mid-infrared (FT-MIR) and FT-far-infrared (FT-FIR) absorption spectra. As a result, it has become clear that each antioxidant in general gives a clear specific FT-FIR spectrum even when the FT-MIR spectrum of the corresponding antioxidant is very similar to the spectra of other antioxidants.