Mechanical Properties and EMI-Shielding Efficiencies of Graphite and Iron(II) Oxide-Filled Polypropylene and Polyethylene-Based Polymer Composites

In this study, polypropylene (PP), polyethylene (PE), PP/PE blends containing graphite (1–3 wt.%) and FeO (10–30 wt.%) fillers were prepared using a meltMelt mixing method. The effects of graphite and iron oxide amount on the mechanical propertiesMechanical properties and electromagnetic interference (EMI) shielding efficiencyShielding efficiency in the frequency range of 8–12 GHz (X-band) were investigated. The tensile strength value of the PP/graphite/FeO (1:10) sample increased from 26.09 to 32.47 MPa with the increase of the graphite/FeO amount to 3:30 in wt.%. Maximum total shielding efficienciesShielding efficiency of SET ~ 39.35 dB and 38.31 dB could be observed respectively with a corresponding frequency value of 12.2 GHz for PE and PP polymer mixtureMixture filled with 3 wt.% graphite and 30 wt.% FeO with a thickness of 4 mm. The results obtained from the EMI shielding measurements showed that the total EMI SE increased synergistically with increasing FeO/graphite hybrid filler amount for each polymer composition.