Dielectric and optical properties of nitrogen‐incorporated polyethylene films fabricated by plasma polymerization

摘要

AbstractThe dielectric and optical properties of nitrogen‐incorporated polyethylene films fabricated by radio‐frequency glow discharge in ethylene‐nitrogen (C2H4− N2) gas mixtures have been measured for various nitrogen concentrations. The results show that the plasma‐polymerized films have distinct properties from the ones based on conventional chemical polymerization. The incorporation of nitrogen in polyethylene results in an increase in breakdown strength, dissipation factor, and dielectric constant at frequencies below the optical frequency range, and in a decrease in dark conductivity, and in photoconductivity and extinction coefficient in the optical frequency range. However, the incorporation of nitrogen does not cause significant change in refractive index. The effects of the incorporation of nitrogen in polyethylene are attributed to the shallow acceptor‐like traps introduced by incorporat