Low Frequency Dielectric Study of PAPA-PVA-GR Nanocomposites

A new polymer poly[2, 2-bis ((4-acetylbenzoyloxy) methyl) propane-1,3-diyl bis(4-acetylbenzoate)] (PAPA) was synthesized by solution polymerization of pentaerythretole with terephthaloyl chloride. This polymer was characterized by FT-IR spectroscopy. Graphene (GR) was prepared using hydrothermal method. Evaluation of graphene structure was performed using FT-IR and XRD. Polymer composites were prepared by ultrasonic mixing of PAPA and PVA with different GR percentages. Composites films were prepared by a conventional solvent casting technique. The morphological image of the composite materials was studied by scanning electron microscopy (SEM) and the surface topography of these composite materials was studied by Atomic Force Microscopy (AFM). Effects of GR nanoparticles percentage on dielectric properties of PAPA/PVA/GR nanocomposites film at low frequency (100Hz–100 kHz) were studied.