Investigation on dielectric properties of the polyetherketone nanocomposite with lead titanate ultrafines

The dielectric properties of polymer composites with inorganic nanoparticle s were investigated. In the demonstration of the dielectric constant expres sion of the nanocomposite polymer, the dielectric contributions of the disp lacement polarization, the orientation polarization, and the space polariza tion in the nanocomposite polymer were all considered. In the demonstration , two dielectric relaxation models were used, that of Debye for inorganic n anoparticles and the Havriliak-Negami function model for polymers. Then the expression of the complex dielectric constant of the nanocomposite polymer was obtained by using Onsager's local field theory. Furthermore, the nanoc omposite polymer thin films that consist of PbTiO3 nanoparticles and polyet herketone were prepared. The real parts of the dielectric constants were me asured and calculated, respectively. It was found that our calculated resul ts are in good agreement with our measured results.