(705d) Magnetic High Density Polyethylene Nanocomposites Reinfored with in-Situ Synthesized Fe@FeO Core-Shell Nanoparticles

Magnetic high density polyethylene (HDPE) nanocomposites with different loadings of Fe@FeO core-shell nanoparticles were fabricated through a direct thermal decomposition of iron precursor-Fe(CO)₅ in refluxing HDPE-solvent complex. Attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) was utilized to explore the functional groups of these nanocomposites, and the dispersion of the Fe@FeO core-shell nanoparticles was investigated by transmission electron microscopy (TEM). Mössbauer spectrum analysis was used to determine the exact species of these magnetic nanoparticles. The X-ray diffraction (XRD) analysis and differential scanning calorimetry (DSC) characterization were used to further explore the crystalline structure of HDPE with/without these nanoparticles. Magnetic property investigation revealed a soft ferromagnetic behavior for these HDPE PNCs at room temperature and the coercivity was decreased with increasing the particle loading. Thermal gravimetric analysis (TGA) demonstrated that the thermal stability of these HDPE PNCs was enhanced in the presence of the NPs.  The melt rheological properties and dielectric properties of these HDPE nanocomposites were also evaluated and will be presented as well.