Formation of polypropylene/functional graphene oxide nanocomposites with Different FGs loading in elongation flow condition

Abstract

Aggregation of nanofiller in polymer matrix is the key barrier to enhance the mechanical and thermal properties of polymer nanocomposites. Here, we report a novel vane mixer based on elongation flow processing, which is facial to achieve the homogeneous dispersion of functional graphene oxide sheets (FGs) in isotactic polypropylene (iPP). Scanning electron microscopy reveals that FGs in iPP matrix are fully exfoliated and uniformly dispersed. The crystallization behavior, mechanical properties and thermal stability of the nanocomposites with different FGs loadings are investigated by differential scanning calorimetry, dynamic thermomechanical analysis, and thermogravimetric analysis, respectively. The results illustrate that the mechanical and thermal stability of the iPP/FGs composites has enhancement obviously at low FGs loadings. POLYM. ENG. SCI., 59:830–837, 2019. © 2018 Society of Plastics Engineers

Extrusion of Polymer Nanocomposites with Graphene and Graphene Derivative Nanofillers: An Overview of Recent Developments

“…These new nanocomposites have been obtained by extrusion, in most cases twin-screw extrusion, which can be followed by injection molding. Table 2 shows that polypropylene (PP) matrix has been most commonly used [47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62] due to its availability and ease of processing. The effect of the concentration of nanofillers is a key parameter in the processing of nanocomposites.…”

“…% was obtained by compression molding, thus increasing electrical conductivity. In order to avoid agglomeration of the nanofiller, elongation flow processing for the dispersion of GO sheets in isotactic PP has been employed [50]. The more effective dispersion of the nanophases led to the increase of the thermal stability and mechanical properties of the nanocomposites with increasing GO content.…”

Review of the past and recent developments in functionalization of graphene derivatives for reinforcement of polypropylene nanocomposites

“…[196,197] Besides, they have good barrier effect and huge specific surface adsorption ability that helping the decrease in heat and mass transfer. [51] Furthermore, Yuan et al showed the effectiveness of application of RGO at low loadings of 0.5 to 1 wt% in RGO/iPP composites to reduce the heat and smoke release because of the improvement of swelling of char which cause the superior in isolation of char. Furthermore, the compactness of char for RGO/iPP composites was improved based on the observation from morphology of char residues.…”

Effect of Carbon Fillers on the Wear Resistance of PA6 Thermoplastic Composites

“…As reinforcements, different microfillers in the shape of fibers [ 1 , 2 , 3 ], powders [ 4 , 5 ], or nanofillers [ 6 , 7 , 8 , 9 , 10 , 11 , 12 ] are used. Metal particles, ceramic powders or fibers, and natural fibers are widely applied as reinforcements as well.…”