Mechanosynthesized Composite Materials Based on Ultrahigh Molecular Weight Polyethylene Modified with Magnesium Ferrite Particles

摘要

Composite materials based on ultrahigh molecular weight polyethylene (UHMWPE) and magnesium ferrite particles-precursors for future formation of light protective material against electromagnetic radiation-have been synthesized mechanochemically. By application of scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, and magnetic measurements, the influence of the methods of synthesizing ferrite particles (solid phase, coprecipitation, sol-gel, or mechanosynthesis) on the structural and morphological characteristics of UHMWPE/ferrite composite materials has been studied. It is shown that the mechanochemical method of composite formation contributes to as an increase in the dispersity ferrite particles, by their nonuniform distribution in the UHMWPE volume with the transformation of its supramolecular structure. The method of synthesizing ferrite particles has a different effect on the formation of the molecular structure of UHMWPE: the appearance of a larger number of molecular structures with low melting points was a sign of greater homogeneity of mixing using smaller and uniform particles of ferrite. The observed formation of low molecular weight polymer chains should increase the rate of mutual diffusion between the boundaries of the polymer particles, which in sintering processes will lead to better sintering of the particles.