http://elar.nung.edu.ua/handle/123456789/7354 The scientific journal Sat, 04 Apr 2026 06:26:47 GMT 2026-04-04T06:26:47Z http://elar.nung.edu.ua/handle/123456789/7365 Title: Polymer composites for improving the resource of pipeline transport Authors: Buketov, A. V.; Sapronova, A. V.; Brailo, M. V.; Sotsenko, V. V.; Yurenin, K. Yu.; Antonio, B. Abstract: Epoxy-composite protective coatings filled with anti-agglomerating additive have been investigated using IR-spectral analysis. The presence of O-H and C-H bonds in the range of wave numbers ν = 2848–2922 cm-1, C-C in the range of wave numbers ν = 1112–1541 cm-1 and the amino groups in the range of wave numbers ν = 623–667 cm-1, indicating the catalytic activity of the additive. It has been established that it is expedient to use an additive for the contents of q = 20 pts.wt. for the formation of the adhesive layer of coating, while there was observed the maximum growth of adhesion strength. Then, as for the formation of a coating with high cohesive strength, it is advisable to use an additive containing q = 10–20 pts.wt., which provides both elastic properties and moderate stiffness of the epoxy composite material. By the method of optical microscopy there is analyzed the structure of epoxy composites and determined the optimum content of the filler with the ordered structure, without defects, which provides high indicators of cohesive strength of materials. Mon, 01 Jan 2018 00:00:00 GMT http://elar.nung.edu.ua/handle/123456789/7365 2018-01-01T00:00:00Z http://elar.nung.edu.ua/handle/123456789/7364 Title: Effect of strong constant magnetic field on the nanostructural organization and prop erties of the welded joints of hard-to-weld polymers (like polyethylene – polypropylene) Authors: Iurzhenko, M. V. Abstract: Peculiarities of nanostructural organization, thermomechanical and performance characteristics of the welded joints of hard-to-weld polymers (like polypropylene-polyethylene) formed under the effect of strong constant magnetic field (B ~1 Т), as well as without such effect, were investigated by WAXS, SAXS, thermomechanical analysis and mechanical testing methods. It was determined that strong constant magnetic field causes formation of the oriented structure of the welded joint, where the axle of structurization coincides with the field axle. This effect reveals in improvement of the thermomechanical and the performance characteristics of the welded joints. Basing on the mechanical tests results it was founded that tensile strength of PE-80/PP-80 joint welded under the effect of constant magnetic field (acting transversally to the welding axle) is 12 MPa, and of welded without magnetic field effect is 6 MPa. Mon, 01 Jan 2018 00:00:00 GMT http://elar.nung.edu.ua/handle/123456789/7364 2018-01-01T00:00:00Z http://elar.nung.edu.ua/handle/123456789/7363 Title: Influence of cathode polarization on protective properties of thermoreactive coatings for main pipelines Authors: Osadchuk, S. O.; Nyrkova, L. I.; Rybakov, A. O.; Melnychuk, S. L. Abstract: The effect of cathodic polarization under cyclical temperature changing (from room temperature to 70 oC) on the protective properties of new and artificially aged heat-curing coatings for main pipelines has been investigated. It is shown that cathodic disbondment of coatings depends on their properties, temperature, applied potential. It has been established that the reducing (by absolute value) of the protective potential (with the IR component) from -1.45 to -0.75 V facilitate to retaining of the protective properties of coatings: the disbondment radius of a new hybrid-epoxide coating decreases in 3.3 times, aged coating – in 1.7 times, new and aged polyurethane coating – more than 20 times. Mon, 01 Jan 2018 00:00:00 GMT http://elar.nung.edu.ua/handle/123456789/7363 2018-01-01T00:00:00Z http://elar.nung.edu.ua/handle/123456789/7362 Title: The study of the impact of 4,4'-methylenbis (2-methoxyaniline) on adhesive properties of the epoxy matrix for protective coatings of transport means Authors: Buketov, A. V.; Bezbakh, O. M.; Yatsyuk, V. M.; Negrutsa, R. Yu. Abstract: It is shown that one of the main means of regulating the structure and properties of polymer composites is their physical modification. It has been proven that the introduction of plasticizers and fillers into the binder makes it possible to improve the properties of materials. The effect of the 4,4'-methylenebis (2-methoxyaniline) modifier on the adhesion properties of the epoxy matrix has been investigated. The optimal concentration of the modifier has been established, ensuring maximum indicators of the adhesive strength of the matrix when separated from the steel St. 3 base. The method of IR-spectroscopy established the chemical structure of the modifier, confirming its activity to interact with the epoxy oligomer in the course of polymerization with a binder. This provides obtaining material not only with improved adhesion strength, but also with negligible residual stresses. Mon, 01 Jan 2018 00:00:00 GMT http://elar.nung.edu.ua/handle/123456789/7362 2018-01-01T00:00:00Z