TY - JOUR AU - L. P. Klymenko, Е. А. Lysenkov, PY - 2023/05/18 Y2 - 2024/03/28 TI - Functional properties of polymer composite materials based on polypropylene, carbon nanotubes and silver nanoparticles for transportation systems JF - JOURNAL OF HYDROCARBON POWER ENGINEERING JA - jhpe VL - 9 IS - 1 SE - MATERIALS SCIENCE DO - 10.31471/2311-1399-2022-1(17)-8-13 UR - https://ogpe.nung.edu.ua/index.php/jhpe/article/view/188 SP - 8-13 AB - <p>Due to its unique characteristics, the creation of polymer nanocomposite materials opens wide prospects for their use in<br>transportation systems. The influence of carbon nanotubes (CNT) and silver nanoparticles (SN) on the functional properties of<br>polymer composites based on polypropylene (PP) was studied using the methods of impedance spectroscopy, differential<br>scanning calorimetry, and mechanical analysis. It is shown that the introduction of nanofillers leads to a decrease in the degree<br>of crystallinity and the melting temperature of polypropylene-based systems, which is a consequence of the destruction or<br>increase in the defectivity of the crystalline structure of the polymer matrix under the influence of inorganic nanoparticles. Due<br>to a more developed surface, SN have a greater influence, compared to CNT, on the thermophysical characteristics of the studied<br>materials. At a filler content of 0.5 %, the crystallinity of unfilled PP, which is 72.1 %, decreases to 64.7 % in the case of CNT<br>filling and to 53.4 % in the case of SN filling. An extreme change in the electrical conductivity of polymer composites is observed,<br>which is a consequence of the formation of a percolation cluster in the polymer matrix, a mesh of filler that permeates the entire<br>volume of the material. The maximum electrical conductivity is observed at a filler content of 2 %. For the PP-СNT system, the<br>maximum electrical conductivity is 10-5 S/cm, and for the PP-SN system, it is 10-9 S/cm. An extreme change in the electrical<br>conductivity of polymer composites is observed, which is a consequence of the formation of a percolation cluster in the polymer matrix, a network of filler that permeates the entire volume of the material. As a result of conducted studies of electrical conductivity, the percolation threshold was determined, which for these systems filled with CNT is 0.5 %, and for systems containing SN is 0.82 %. An increase in mechanical strength was recorded, which for PP-CNT systems increases by<br>approximately 50 %, and for PP-SN systems by about 30 %. The obtained properties make the studied materials promising for<br>use in transportation systems.</p> ER -