Microstructure and Morphology Properties of Nanocomposite Based on Polypropylene/Ethylene Propylene Diene Monomer/Graphene

Polypropylene (PP)/ethylene propylene diene monomer (EPDM)/graphene nanosheets (GNs) were compounded by a two-step melt mixing process via an internal mixer. The effect of GNs, graphene oxide (GOSs) and graphene oxide functionalized with PP chains (PP-g-GOSs) on various blend properties were investigated. Wide X-ray diffraction (WAXD) patterns and transmission electron microscopy (TEM) images of the prepared nanocomposites revealed that the nanofillers mostly dispersed into the PP phase and the dispersion state of GNs was improved with functionalization of graphene. SEM photomicrographs indicated that rubber droplets were distributed in the PP phase and a reduction of the dispersed EPDM droplet size was observed most likely due to increase in the viscosity of the PP-phase during melt mixing. The effects of nanofillers on thermal, mechanical and rheological properties were reported, and the obtained results were discussed in terms of morphology, state of dispersion and distribution of the nanofillers within the PP matrix

کلیدواژه ها:

Graphene-melt mixing-functionalization-microstructure-mechanical properties