Low concentration of inorganic fullerene tungsten sulfide nanofiller to achieve cost‐effective and significant enhancement on thermal and dynamic mechanical properties of perfluoroalkoxy nanocomposites

Abstract Special insulated wires beyond the conventional pure perfluoroalkoxy (PFA) polymers need to be developed to meet the increasing thermal management and mechanical performance requirements. Advanced PFA nanocomposites enhanced by inorganic fullerene tungsten sulfide (IF‐WS₂) nanoparticles have been fabricated by melt blending and hot press processes. Benchmarked against the PFA, the presence of IF‐WS₂ nanoparticles in the composites resulted in a maximum tensile strength of 21.35 MPa and a maximum elongation at break of 275%, which are 66% and 149% higher than those of pure PFA, respectively. The nanocomposites with 0.5 wt% IF‐WS₂ achieved a 17.5% increase in storage modulus, 26.8°C increase in the onset melt temperature, while 1 wt% IF‐WS₂ increased the glass transition temperature (T_g) by 3.4°C and the crystallinity (χ_c) by up to 34.4%. And when the additional amount of IF‐WS₂ nanomaterials is 0.25%, the best combination of performance is obtained.