Evaluation of Thermal Properties of Epoxy Composites Filled with Different Filler Materials

Abstract

The present work is twofold in the first part of the work, the impact of nanofiller used in an newlineepoxy matrix by varying filler content to study thermal characteristics of prepared composites newlinelike linear thermal expansion coefficient, thermal conductivity, heat capacity, thermal stability, newlineand thermal diffusivity using experimental techniques as per ASTM standard. Nanoclay is used newlineas a nanofiller initially due to its insulating properties and to analysis the behavior of composite newlinebased on filler characteristics. Results show a variation in thermal properties at different newlinetemperatures and for different compositions of nanofiller. At a particular temperature, the newlinethermal conductivity and diffusivity decrease, but the composite responds to an increase in newlinespecific heat and thermal stability with an increase in filler content. newlineIn the second stage, Graphene, conducting polymers: Polyaniline, and Polypyrrole along with newlineanticorrosive additive red lead used as nanofiller to prepare epoxy hybrid nanocomposites. newlineEpoxy composites with Graphene nanoparticles of different compositions were prepared and newlinesubjected to EMI absorption at S-band frequency. The effective absorption of Epoxy with newlineGraphene nanoparticle composite composition had selected for hybrid composite preparation. newlineThe effective S-band absorption Graphene composition is maintained constant for hybrid newlinecomposite fabrication i.e., epoxy with 0.5wt% of Graphene. The conducting polymers and newlineanticorrosive additive are added with epoxy with 0.5 wt% of Graphene with varying newlinecomposition to form hybrid composites. Effective hybrid EMI shielding composite newlineinvestigated at S-band with Vector Network Analyzer. Thermal behavior analysis of individual newlineand hybrid composites had performed with different instruments like DSC, TGA, TMA, and newlineGuarded comparative longitudinal heat flow techniques. newlineResults show conductive polymers with high heat resistance, minimal thermal expansion newlinecoefficient, and enhanced thermal diffusivity but, anticorrosive nanofiller red oxide shows low newlinestability, l