Akademik Veri Yönetim Sistemi
Emergent Materials, 2025 (ESCI)
The ethylene-propylene-diene rubber (EPDM)-based hybrid nanocomposites with graphene nanoplatelets (GnPs) and multiwall carbon nanotubes (MWCNTs) were prepared by melt mixing followed by compression molding to investigate the synergic and size effect of GnPs and MWCNTs on the morphological, electrical, thermal, mechanical, and viscoelastic properties of samples at different nanofiller loadings and GnPs/MWCNTs ratios. The size, content, and ratio of GnPs and MWCNTs have a considerable effect on the final hybrid nanocomposite properties. To achieve the best properties of the EPDM-based hybrid nanocomposites, all factors should be considered together. There is no synergic effect between GnPs and MWCNTs as far as the electrical and thermal properties of samples are concerned. However, the concurrent presence of GnPs with a larger specific surface area (SSA) and MWCNTs with a higher aspect ratio (AR) in the EPDM matrix exhibits better electrical and thermal conductivity compared to the other combination of carbon-based nanofillers. For hybrid nanocomposites, the GnPs with higher SSA, demonstrate relatively high tensile strength along with significant elongation at break, which could be attributed to their low AR and high SSA. The hybrid nanocomposites with better dispersion of fillers, particularly GnPs with larger SSA and MWCNTs with higher AR, show a lower peak height in the tan delta indicating no presence of big agglomerates. For these nanocomposites, an important factor is the higher AR, facilitating the formation of a more effective reinforcement network structure.