Maksym Iurzhenko

E.O. Paton Electric Welding Institute · Plastics Welding

Electrothermal processes were studied in pyroresistive composites based on high-density polyethylene (HDPE) containing 8 vol.% carbon black (CB), 8 vol.% carbon fibers (CF), and their mixture 4 vol.% CB + 4 vol.% CF. It is shown that the kinetic heating curves of composites are well described by an exponential dependence with a certain heating rate...

The purpose of the work was to develop a new method of processing samples with a piezoresistive effect that will be sensitive to cyclic mechanical loads. The sensor material was based on ground vulcanizate, which was coated with a solution of an adhesive thermoplastic carrier-polymer containing different types of carbon filler. The samples were for...

One of the most important directions in the development of additive manufacturing or three-dimensional (3D) printing technologies is the creation of functional materials, which allow not only prototyping but also the manufacturing of products with functional properties. In this paper, poly-lactide acid (PLA) /carbon black (CB) composites with segre...

Novel nanocomposite flm materials were fabricated by thiol-epoxy click reaction in the presence of ≤1.0 wt% graphene oxide (GO). SEM, X-ray difraction, and FTIR techniques were used for comprehensive characterization of the nanocomposites' morphology and structure. The grafting of GO into the epoxy vitrimer network was confrmed. The efect of loadin...

Green synthesis of silver-containing nanocomposites based on polylactide (PLA) was carried out in two ways. With the use of green tea extract, Ag+ ions were reduced to silver nanoparticles with their subsequent introduction into the PLA (mechanical method) and Ag+ ions were reduced in the polymer matrix of PLA-AgPalmitate (PLA-AgPalm) (in situ meth...

Antimicrobial and antiviral nanocomposites based on polylactic acid (PLA) and chitosan were synthesized by a thermochemical reduction method of Ag+ ions in the PLA-Ag+-chitosan polymer films. Features of the structural, morphological, thermophysical, antimicrobial, antiviral, and cytotoxic properties of PLA-Ag-chitosan nanocomposites were studied b...

A number of polymeric materials are translucent for infrared radiation. The use of low-power infrared lasers makes it possible to weld polymer sheets due to the penetration of radiation into the material depth. The possibilities of transmission welding of polybutene sheets, as well as several layers of polyethylene film are investigated. Epilog Fib...

Novel antimicrobial and antiviral silver-containing nanocomposites (PLA-Ag-PEI) based on polylactide (PLA) have been created by the thermochemical reduction of Ag⁺ ions in the polymer films. Structure-properties relationships of nanocomposites were investigated using FTIR, WAXS, TEM, DSC, TGA. It was found that thermochemical reduction of Ag⁺ ions...

Currently, the scope of application of laser welding is constantly expanding, in particular for the connection of polymer films of different types. This method of welding successfully competes with traditional methods, such as welding with heated tools and ultrasound in the light, medical, food and packaging industries. Advantages of laser welding...

Conductive polymer composites have been developed based on high‐density polyethylene filled with carbon black (HDPE‐CB), capable of generating heat when an electric voltage is applied. For each voltage value, the composite reached a constant value of equilibrium temperature, which obeyed a quadratic dependence on voltage and a linear dependence on...

Electrical and thermal properties of composites based on high-density polyethylene filled with nanofillers, namely carbon black (CB), carbon fiber (CF) and their mixture, were investigated under alternating current. The composite samples were prepared by thermal pressing from the mechanically mixed blend. High-density polyethylene (HDPE) was used a...

The article presents the results of complex thermal and structural studies of two technical types of polyethylene (PE-80 and PE-100) and their welded joint. It was established by mathematical calculations as well as experimental investigations that during conventional heated tool butt welding recrystallization of polymers occurs resulting in the fo...

Nowadays, one of the most important research directions in development and creation of functional polymeric materials is a search of new solid electroactive polymers with high ionic conductivity at elevated temperatures. Particularly, the widening range of materials, which can be used for this purpose, is relevant. The present work is concerned wit...

The paper presents results of the investigation of structure relaxation and thermal properties of PE-80 and PE-100 polyethylene hot-tool butt welds. It was found that a weld with the re-crystallized crystalline structure is formed during the welding of dissimilar types of polyethylene. It is shown that within a long period (1 year) the relaxation o...

The article is concerned with hybrid amorphous polymers synthesized basing on epoxy oligomer of diglycide aliphatic ester of polyethylene glycol that was cured by polyethylene polyamine and lithium perchlorate salt. Structural peculiarities of organic-inorganic polymer composites were studied by differential scanning calorimetry, wide-angle X-ray s...

Based on obtained experimental data on different structural levels, analytical estimates were made that show the influence of specific structural parameters (phase composition, grain and subgrain structures) on the mechanical properties of welded joints depending on the laser welding modes. Technological modes of laser welding of high-strength 14Kh...

The monograph is devoted to the scientific, technological, technical and industryoriented developments, investigations and testing in the field of welding of high-tech (high-performance) and, in the first place, heat-resistant polymers, polymeric composite materials (PCM) on their base and products manufactured of them. On an example of two high-te...

A structure of amorphous polymer systems based on aliphatic epoxy oligomers and lithium perchlorate salt are studied by methods of IR spectroscopy and wide-angle X-ray scattering. As established, there is a coordinating interaction between lithium cations and ether oxygen atoms of polymer chains. Gradual increasing of the salt LiClO4 content within...

The paper is concerned with a complex studies of structure, its relaxation behaviour, thermal and thermomechanical properties of the welded joints of the PE-80/PE-100 polyethylenes formed by conventional heated-tool butt-welding method. The results of investigations confirm that the welded joint, in which structure recrystallization of crystalline...

As it is known, polyethylene (PE) is one of the common materials in the modern world, and PE products take the major share on industrial and trade markets. For example, various types of technical PE like PE-63, PE-80, and PE-100 have wide industrial applications, i.e., in construction, for pipeline systems etc. A rapid development of plastics indus...

In the present work, ion-conductive hybrid organic-inorganic polymers based on epoxy oligomer of diglycide aliphatic ester of polyethylene glycol (DEG) and lithium perchlorate (LiClO4) were synthesized. The effect of LiClO4 content on the electrophysical properties of epoxy polymers has been studied by differential scanning calorimetry (DSC) and br...

The scientific and industrial field of hybrid organic-inorganic polymer systems (HOIS) is widened in recent years due to possibility of combination of various organic and inorganic building blocks and obtaining hybrid materials with novel characteristics. The aim of the present paper is to develop the knowledge of the relationships between mechanic...

The relaxation processes of hybrid organic-inorganic polymer nanosystems (OIS) synthesized by joint polymerization of organic and inorganic components were studied using methods of differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA), and broadband dielectric relaxation spectroscopy (DRS). The organic component was a...

Epoxy-polysiloxane composites of cationic polymerization were synthesized based on epoxy resin and tetraethoxysilane. The thermophysical properties of the resulting polymers were studied. It was established that, as the filler content increases from 0.5 to 3 wt %, the molecular weight of an intermodal segment increases and the cross-linking density...

The book is devoted to the electroactive polymer materials (EPM) with electronic and ionic conductivity, and consists of six chapters, two of which cover the study of polymeric materials with electronic conductivity. They are polymer composites and nanocomposites containing dispersed metals and nanotubes. The remaining chapters devoted to the mater...

Demand of polymeric materials is very high for the up-to-date stage of techniques and newest technologies development. As a result the yearly growth of the world consumption of polymers is observed. Development of the polymer technologies shifts towards creation of functional polymer systems which are able to provide specific properties (optical, e...

A study was made of how aspects of the mechanical and thermal responses of thermoplastic polyurethane elastomers vary with composition: the hard segment, soft segment and chain extender were varied systematically with the aim of improving understanding of the relationship between molecular/supramolecular architecture at the nm-scale and macroscopic...

Dependencies of physical-chemical characteristics on structure development during polymerization of organic-inorganic systems (OISs) have been investigated. The non-monotonic behavior of the physical parameters has been found. This effect was explained by complicated structure of OISs, which consists of two interpenetrating hybrid organic-inorganic...

Dependencies of physical-chemical characteristics on structure development during polymerization of organic-inorganic systems (OISs) have been investigated. The non-monotonic behavior of the physical parameters has been found. This effect was explained by complicated structure of OISs, which consists of two interpenetrating hybrid organic-inorganic...

The aim of the research is to establish mechanisms of structure formation of hybrid organic-inorganic systems based on urethane oligomers and silicates, depending on reactivity of organic component, to identify the impact of structural organization of OIS obtained on their electrophysical and thermomechanical properties, sorption and sensor activit...

Hybrid organic–inorganic polymer systems (OIS) were obtained in reactions of the organic oligomer (macrodiisocyanate + poly(isocyanate) (MDI + PIC)) which has free isocyanate groups with inorganic oligomer – sodium silicate (SS). The structure of OIS was formed as two interpenetrated networks: an elastic network as a result of reactions MDI–SS and...