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Citation: SONG Yu-Feng, ZHU Zhi-Yong, JI Te, GE Min, CHEN Xi-Liang, LIU Qi. THz time-domain spectroscopic study of polyethylene-carbon black composites[J]. Acta Physico-Chimica Sinica, ;2007, 23(02): 177-180. doi: 10.3866/PKU.WHXB20070208 shu

THz time-domain spectroscopic study of polyethylene-carbon black composites

1.
Shanghai Institute of Applied Physics, Chines Academy of Sciences, Shanghai 201800, P. R. China;Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China

Received Date: 12 July 2006
Available Online: 30 January 2007

Terahertz time-domain spectroscopic technique was applied to investigate the optical properties of polyethylene-carbon black composites in the frequency range of 0.3-2.0 THz as a function of frequency and volume fraction of the carbon black. It is found that the absorption coefficient and the refractive index of the composite increased with increase of carbon black content. At the same carbon black concentration, the absorption coefficient increased and the refractive index decreased with increase of frequency. The experimental measurements were analyzed by using Debye theory of dipole relaxation under the assumption that carbon black particles dispersed in the polyethylene matrix behave like dipoles and contribute mainly to the dielectric loss.
- Polyethylene-carbon black composite;THz time domain spectra;Dielectric properties
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