Influence of nano graphene on mechanical behavior of PA66/PA6 blend based hybrid nano composites: Effect of micro fillers

The influence of Nano Graphene on the mechanical behavior of PA66/PA6 blend based hybrid micro composites was studied. The blend PA66/PA6 in 80/20 wt% is selected as the base material for the development of composites. The materials systems used for the study are: Blend (PA66/PA6), Blend/PTFE/MoS2/TiO2 and Blend/PTFE/MoS2/TiO2/Nano Graphene. These composites were produced by melt mix method using extrusion technique followed by injection molding. The mechanical behavior of these nano composites were studied using tensile, flexure and impact behavior as per ASTM methods. The results showed that the addition of Nano Graphene in to micro composites slightly deteriorated the tensile strength followed by decrease in ductility. Further, an appreciable improvement in flexural strength has been observed. The impact response seemed to be slightly poor under the influence of nano graphene. This decrease in properties is due to transformation of ductile phase to brittle phase as an effect of inclusion of nano particles. Further, the crystal plane has been slid due to the effect of disturbance in the micro zone of potential fillers in composites. The morphology of failure surfaces through SEM images showed that the agglomeration of micro fillers, micro voids and nonlinear fracture were the reason for failure. (C) 2019 Elsevier Ltd. All rights reserved.