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THE EFFECT OF CARBON NANOTUBES MODIFICATION ON MICROSTRUCTURE AND FUNCTIONAL PROPERTIES OF POLYMER NANOCOMPOSITES BASED ON POLYETHYLENE

To expand the operational characteristics of polymer materials, nanofillers are introduced into their composition, one of the most promising is carbon nanotubes. However, the creation of such nanocomposite materials is associated with a number of difficulties, in particular with the need to evenly distribute the filler in the polymer matrix.One of the promising directions for solving the distribution problem is the functionalization of carbon nanotubes using various methods. Each method has its advantages and disadvantages. Most of them lead to the growth of only certain propertiesof materials, but their application is an expensive and time-consuming process.The analysis of research and publications in the field of improving the functional characteristics of polymer nanocomposite materials showed that the issue of non-covalent modification of carbon nanotubes and their use as a filler for the creation of structural materials is currently receiving little attention in the scientific literature.The purpose of this work is to improve the functional characteristics of polymer nanocomposite materials based on high-density polyethylene by means of non-covalent modification of carbon nanotubes introduced into their composition.The scientific article presents the results of studies of the microstructure and functional characteristics of polymer nanocomposite materials based on polyethylene by introducing modified carbon nanotubes into their composition. In order to improve the properties of the materials, nanotubes were modified using polyethylene glycol. Using the methods of optical microscopy, impedance spectroscopy and mechanical tests the microstructure, electrical and mechanical characteristics of polymer nanocomposite materials were investigated. It is shown that the non-covalent functionalization of CNTs by means of treatment with polyethylene glycol leads to a better distribution of nanotubes in the polymer matrix and an improvement of the electrical and mechanical properties of polyethylene-based nanocomposite materials.