Spectroscopic studies, Thermal behavior, Ac impedance study and Dielectric properties of Silver Doped Polyaniline / Strontium titanate Composite

摘要

The present study is an exploration of a.c impedance study and dielectric properties of IPANI/Ag/SrTiO_3 (PAS) composites synthesized by in-situ oxidative interfacial polymerization spending (NH_4)_2S_2O_8 at ice-cooled temperature. The prepared samples were characterized by using various physical methods viz., FT-IR, XRD and their thermal behavior was studied by DSC techniques. FT-IR and XRD profile reveals the formation of PAS-50% composite and distribution of particles homogeneously in the polyaniline matrix. The increased thermal stability of the synthesized PAS-50% composite may be due to interfacial interaction of IPANI with SrTiO_3 crystallites embedded with silver nanoparticles evidenced by XRD studies. The real and imaginary dielectric constant values of the PAS-50% composite decreases with increasing frequency.