INVESTIGATION OF THE PROPERTIES OF NANOCOMPOSITES ON THE BASIS OF MIXTURE OF HIGH AND LOW PRESSURE POLYETHYLENES WITH METAL-CONTAINING NANOFILLERS

It has been investigated the influence of nanofillers addition containing nanoparticles of copper oxides (I), stabilized by the polymer matrix of maleinated high-pressure polyethylene, obtained by the mechanical-chemical method, on the peculiarities of structure and properties of the metal-containing nanocomposites on the basis of mixture of high-and low-pressure polyethylenes by the methods of differential-thermal, X-ray phase and scanning electron microscope analyzes. It has been shown that the introduction of 0.3-0.5 wt % of nanofillers into the composition leads to an increase in the strength index from 16.69 to 19.15 MPa and the deformation values at break of the composite in 1.7 times, which, has been apparently stipulated by the synergetic effect of interaction of the copper-containing nanoparticles with maleic groups of maleinated high pressure polyethylene, the mutual influence of which favors the increase in both the deformation value and the strength index. The investigation of the thermal properties of the investigated samples showed that the introduction of nanofillers containing copper oxide (I) nanoparticles into the composition of mixed polyethylenes favors the considerable increase in the decay temperature of the samples, and the activation energy of the decay of the thermal-oxidative destruction of the obtained nanocomposite is increased from 232.96 to 274.76 kJ/mol. The obtained results indicate that small quantities of nanofiller (0.3-0.5 wt %) introduced into the polymer, evidently, play the role of structure-forming agents - artificial crystallization nuclei, which favors the appearance of fine spherulite structure in the polymer, characterized by improved physical -mechanical and thermal properties of the obtained nanocomposite