Frequency Responses of Ag Nanoparticles in Polyurethane Resin

The frequency properties of Ag nanoparticles in polyurethane have been investigated. The Ag nanoparticles prepared by phase transfer method were added to polyurethane resin and hardened with polyisocyanate. From the experimental results, the frequency responses of the hydride resin arise with the little addition of Ag nanoparticles. The electric permittivity and magnetic permeability of the resin cut‐off at about 9.0×108 Hz. As a result, the reflective energy loss increased with the addition of Ag nanoparticles. The fluctuation of frequency response might come from the coupling effect and the polarization of nanoparticles under electromagnetic field.