The attitude of the youth towards terrorism and moral principles

Настоящий обзор показывает уязвимость положения современной молодежи. В самом активном, созидающем возрасте определенная часть молодежи республики становится подверженной асоциальным явлениям, которые начинают диктовать негативный образ жизни. Был проведен социологический опрос – анкетирование среди молодежи от 14 до 23 лет, на основании результатов которого сформулированы соответствующие рекомендации по профилактике экстремизма.The present review shows the vulnerability of today’s youth. In the most active, creative age, some students of the Republic becoming subject to antisocial phenomena that dictate a negative lifestyle. It was conducted a sociological poll – a survey among youth 14 to 23 years, based on the results of which are formulated corresponding recommendations for the prevention of extremism

Development and research of basalt plastic material for the flood protection structures

Due to the increasing number of catastrophic floods around the world, creation of an effective system to protect against natural disasters became particularly relevant. The paper investigates introduction of the basalt fiber to reinforce the composite sheet piles. Influence of the reinforcing fiber interlacing type on the nature of plastics destruction was established. Results of the work prove that basalt plastic (BP) exhibits higher climatic resistance than the fiberglass plastic (FGP). After post-curing, strength characteristics relative to the second year were decreasing by 15% with BP and by 22% with FGP in extension, and the strength limit in bending was decreasing by 12% with BP and by 47% with FGP. It was experimentally shown that under a long-term stationary thermal and humidity effect of 23°C/68RH, diffusion was observed on the basalt and fiberglass plastics consisting of two stages. The first stage had a satisfactory statistical error and was adequately approximated by the Fick’s diffusion model and the relaxation model. The second stage had an unsatisfactory statistical error for approximation and was of the spasmodic nature, while the jump in FGP was the largest indicating that the FGP was more susceptible to destruction exposed to the influence of long-term temperature and humidity regime of 23○С/68 RH, than the BP

Surface Treatment of Carbon Fiber Reinforcement to Increase Adhesion with Butadiene Elastomer

В работе приводятся результаты исследования увеличения адгезионного взаимодействия бутадиенового эластомера с армирующей тканью на основе углеволокна. Повышения адгезии эластомера с углеволокном добивались путем поверхностной обработки армирующей ткани, растворенной резиновой смесью в толуоле и клеем Хемосил. В результате исследования высокомодульных материалов на расслоение эластомера от углеволокна наблюдается повышение прочности адгезии. При обработке хемосилом армирующей ткани разрушение происходит по эластомеру, прочность соединения с углеволокном превышает когезионную прочность эластомера. Увеличение адгезии между армирующим наполнителем и бутадиеновой матрицей приводит к изменению упругопрочностных свойств полученных высокомодульных материалов, происходит увеличение прочности при разрыве, твердости, снижение относительного удлинения и абразивостойкости. Методом электронной микроскопии установлено, что поверхностная обработка углеткани приводит к образованию плотного контакта с эластомерной матрицей. При помощи термомеханического анализа показано, что данные материалы могут эксплуатироваться при отрицательных температурахThis study presents the results of the study of increasing the adhesive interaction of butadiene elastomer with the reinforcing fabric based on carbon fiber. Increased adhesion of elastomer with carbon fiber was achieved by surface treatment of reinforcing fabric with dissolved rubber mixture in toluene and Chemosil adhesive mixture. Examination of high-modulus materials for delamination of elastomer from carbon fiber showed an increase in adhesion strength. When a reinforcing fabric is treated with Chemosil adhesive mixture, the destruction occurs over the elastomer, the bond strength to the carbon fiber exceeds the cohesive strength of the elastomer. Increase of adhesion between reinforcing filler and butadiene matrix leads to change of elastic and strength properties of obtained high-modulus materials: increase of tensile strength and hardness, decrease of relative elongation and abrasion resistance. The method of electron microscopy has established that the surface treatment of carbon fabric leads to the formation of a dense contact with the elastomeric matrix. Thermomechanical analysis shows that these materials can be operated at negative temperature

Development and research of basalt plastic material for the flood protection structures

Due to the increasing number of catastrophic floods around the world, creation of an effective system to protect against natural disasters became particularly relevant. The paper investigates introduction of the basalt fiber to reinforce the composite sheet piles. Influence of the reinforcing fiber interlacing type on the nature of plastics destruction was established. Results of the work prove that basalt plastic (BP) exhibits higher climatic resistance than the fiberglass plastic (FGP). After post-curing, strength characteristics relative to the second year were decreasing by 15% with BP and by 22% with FGP in extension, and the strength limit in bending was decreasing by 12% with BP and by 47% with FGP. It was experimentally shown that under a long-term stationary thermal and humidity effect of 23°C/68RH, diffusion was observed on the basalt and fiberglass plastics consisting of two stages. The first stage had a satisfactory statistical error and was adequately approximated by the Fick’s diffusion model and the relaxation model. The second stage had an unsatisfactory statistical error for approximation and was of the spasmodic nature, while the jump in FGP was the largest indicating that the FGP was more susceptible to destruction exposed to the influence of long-term temperature and humidity regime of 23○С/68 RH, than the BP

Assessment of Extremely Cold Subarctic Climate Environment Destruction of the Basalt Fiber Reinforced Epoxy (BFRE) Rebar Using Its Moisture Uptake Kinetics

A quite simple method is proposed for the assessment of extremely cold subarctic climate environment destruction of the basalt fiber reinforced epoxy (BFRE) rebar. The method involves the comparison of experimentally obtained long-term moisture uptake kinetic curves of unexposed and exposed BFRP rebars. A moisture uptake test was carried out at the temperature of 60 °C and relative humidity of 98 ± 2% for 306 days. The plasticization can be neglected because of low-level moisture saturation (<0.41% wt.); the swelling and structural relaxation of the polymer network can be neglected due to the high fiber content of BFRP rebar; moisture diffusion into the basalt fibers can be neglected since it is a much lesser amount than in the epoxy binder. These assumptions made it possible to build a three-stage diffusion model. It is observed that an increase in the density of defects with an increase in the diameter of the BFRP rebar is the result of the technology of manufacturing a periodic profile. The diffusion coefficient of the BFRP rebar with a 6, 10, or 18 mm diameter increased at an average of 82.7%, 56.7%, and 30%, respectively, after exposure to the climate of Yakutsk during 28 months, whereas it was known that the strength indicators had been increased

Investigation of Biofouling and Its Effect on the Properties of Basalt Fiber Reinforced Plastic Rebars Exposed to Extremely Cold Climate Conditions

For the first time, the possibility of penetration of mold fungi mycelium and spore-forming bacteria into the structure of basalt fiber reinforced plastic rebars has been shown in laboratory and field experiments. Biological contamination at the “fiber-binding” border reveals areas of swelling and penetration of mold fungi mycelium and bacterial spore cells into the binder component. After the exposure of samples at extremely low temperatures, strains of mold fungi of the genus Aspergillus were also isolated from the surface of the rebars. Additionally, spore-forming bacteria of the genus Bacillus immobilized for samples from two years ago. This indicates the high viability of immobilized strains in cold climates. Aboriginal microflora isolated by the enrichment culture technique from the samples was represented by: actinobacteria of the genera Nocardia and Streptomyces; yeast of the genus Rhodotorula; and mold fungi of the genus Penicillium. It was shown that the enrichment culture technique is a highly informative method of diagnosing the bio-infection of polymer composite materials during their operation in extremely low temperatures. The metabolic activity of the cells of cryophilic microorganisms isolated from experimental samples of basalt fiber reinforced plastic rebars was associated with the features of the enzymes and fatty acid composition of the lipid bilayer of cell membranes. In the case of temperature conditions when conventional (mesophilic) microorganisms stop developing vegetative cells, the process of transition of the lipid bilayer of cell membranes into a gel-like state was activated. This transition of the lipid bilayer to a gel-like state allowed the prevention of crystallization and death of the microbial cell when the ambient temperature dropped to negative values and as a result, after thawing, growth resumed and the metabolic activity of the microorganisms was restored. Studies have been carried out on the effect of biodepletion on the elastic strength characteristics, porosity and monolithicity of these materials, while at the same time, after a two year exposure, the strength preservation coefficient was k = 0.82 and the porosity increased by more than two times. The results show that the selected strains affect the properties of polymeric materials in cold climates in relation to the organic components in the structure of polymer composites

Effect of Borpolymer on Mechanical and Structural Parameters of Ultra-High Molecular Weight Polyethylene

The paper presents the results of studying the effect of borpolymer (BP) on the mechanical properties, structure, and thermodynamic parameters of ultra-high molecular weight polyethylene (UHMWPE). Changes in the mechanical characteristics of polymer composites material (PCM) are confirmed and complemented by structural studies. X-ray crystallography (XRC), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and infrared spectroscopy (IR) were used to study the melting point, morphology and composition of the filler, which corresponds to the composition and data of the certificate of the synthesized BP. Tensile and compressive mechanical tests were carried out in accordance with generally accepted standards (ASTM). It is shown that BP is an effective modifier for UHMWPE, contributing to a significant increase in the deformation and strength characteristics of the composite: tensile strength of PCM by 56%, elongation at break by 28% and compressive strength at 10% strain by 65% compared to the initial UHMWPE, due to intensive changes in the supramolecular structure of the matrix. Structural studies revealed that BP does not chemically interact with UHMWPE, but due to its high adhesion to the polymer, it acts as a reinforcing filler. SEM was used to establish the formation of a spherulite supramolecular structure of polymer composites

Two-Layer Rubber-Based Composite Material and UHMWPE with High Wear Resistance

The aim of the study is the development of two-layer materials based on ultra-high-molecular-weight polyethylene (UHMWPE) and isoprene rubber (IR) depending on the vulcanization accelerators (2-mercaptobenzothiazole (MBT), diphenylguanidine (DPG), and tetramethylthiuram disulfide (TMTD)). The article presents the study of the influence of these accelerators on the properties and structure of UHMWPE. It is shown that the use of accelerators to modify UHMWPE leads to an increase in tensile strength of 28–53%, a relative elongation at fracture of 7–23%, and wear resistance of three times compared to the original UHMWPE. It has been determined that the introduction of selected vulcanization accelerators into UHMWPE leads to an increase in adhesion between the polymer and rubber. The study of the interfacial boundary of a two-layer material with scanning electron microscopy (SEM) and infrared spectroscopy (FTIR) showed that the structure is characterized by the presence of UHMWPE fibrils localized in the rubber material due to mechanical adhesion