Mechanical properties of Polymer Nanocomposites

A. Ibrahim, A. Klopocinska
Farmingdale state College,
United States

Keywords: graphene nanoplatelets (GNP); polymer nanocomposites, nanoindentation mechanical properties

Summary:

Graphene nanoplatelets (GnPs) were used as a nanofiller in preparing polymer nanocompo-sites.The effect of GNPs on the mechanical properties of polymer nanocomposites were investigated using the nanoindentation tech-nique. Nanocomposites with several GNP vol-ume fractions (0.1 and 0.3) were evaluated. The prepared nanocomposites exhibited a sig-nificant improvement in mechanical properties at a very low xGnP loading. Elastic modulus and hardness of the nanocom-posites measured from the load-displacement curve were higher compared to the neat polymer. Furthurmore, the indentation creep tests were performed during the hold time in the loading cycle. The results indicated viscous deformation occurs during indentation and the creep rate becomes lower at higher GNP volume fraction. Raman spectrum of the nanocomposites showed the two characteristic peaks of gra-phene, G and 2D at 1580 cm-1 and 2690 cm-1 respectively.Scanning electron microscopy (SEM) con-formed that GNP were uniformely distributed in the graphene epoxy nanocomposites.