To Study The Mechanical And Electrical Properties Of Cds/PVK Nanocomposites

Abstract

We have fabricated new types of polymer nanocomposites by chemical rute method that is CdS/PVK polymer nanocomposites with novel organic/inorganic network structures. The   poly N-vinyl carbazole (PVK) was used as a stabilizer as well as host matrix to prevent agglomeration of nanoparticles and have extraordinary optical, mechanical and electrical properties. The synthesize CdS/PVK nanocomposite thin films have been studies their electrical and mechanical properties. The microhardness study on pure PVK and CdS/PVK nanocomposites helps us to inter- and intra- molecular interactions. The CdS/PVK films exhibit lower value of microhardness as compare to pure PVK. For each CdS loading initially, the microhardness increases with the load and thereafter, beyond certain load, tends to attain a saturation value. The dielectric constant decreases at a faster rate in the low frequency range and after 50 KHz it remains almost constant for all samples. By increasing CdS concentration charge storage capacity is reduced which in turn, decreases dielectric constant. It is observed that the dielectric loss decreases with increasing the frequency and then become constant at higher frequency. It is also observed that loss factor increases with increasing CdS concentration in PVK. The conductivity of samples increases with increasing concentration of CdS in PVK matrix. In this case more charge carriers may be able to ‘hop’ by tunneling, which results in increase of bulk conductivity. The higher concentration of CdS makes the polymer more conductive.