Oleksandr Hryhorenko

ORCID: 0000-0003-4629-1010
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About
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Research Areas
  • Environmental and Industrial Safety
  • Flame retardant materials and properties
  • Material Properties and Applications
  • Industrial Engineering and Technologies
  • Mining and Gasification Technologies
  • Metallurgical Processes and Thermodynamics
  • Biological Activity of Diterpenoids and Biflavonoids
  • High Altitude and Hypoxia
  • Polymer Synthesis and Characterization
  • Plasma Diagnostics and Applications
  • Food Industry and Aquatic Biology
  • Polymer Science and Applications
  • Particle accelerators and beam dynamics
  • Advanced Theoretical and Applied Studies in Material Sciences and Geometry
  • Semiconductor materials and interfaces
  • Gas Sensing Nanomaterials and Sensors
  • Advanced Scientific Research Methods
  • Advanced Surface Polishing Techniques
  • Heme Oxygenase-1 and Carbon Monoxide
  • Synthesis and properties of polymers
  • Engineering Diagnostics and Reliability
  • Silicon and Solar Cell Technologies
  • Epoxy Resin Curing Processes
  • Thermal Regulation in Medicine
  • Fire dynamics and safety research

National University of Civil Defense of Ukraine
2020-2024

Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2023

Thomas Jefferson National Accelerator Facility
2023

High Energy Accelerator Research Organization
2023

Institut de Recherche sur les Lois Fondamentales de l'Univers
2023

Université Paris-Saclay
2023

Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2023

CEA Paris-Saclay
2023

Institut National de Physique Nucléaire et de Physique des Particules
2023

Centre National de la Recherche Scientifique
2023

In scientific work is presented the solution of and practical task – development evaluation possibility using difficult combustible epoxyurethane (EU) mastic with increased vibration-damping properties necessary physical mechanical for cladding internal metal surfaces railway rolling stock bodies. The compositions developed based on mixture oligester cyclo-cab (OCC) epoxidian (ED) oligomers addition flame retardant ammonium polyphosphate (APh), as well hydrophobic filler methylaerosil...

10.4028/www.scientific.net/msf.1006.273 article EN Materials science forum 2020-08-07

Abstract Composite materials based on epoxy oligomers due to their unique properties are widely used in various fields of construction and mechanical engineering, including fire retardant coatings. The introduction flame retardants dispersed inert fillers as a rule, affects the structure polymers. When addressing issues related creation flame-retardant, composite materials, there is insufficient data impact mineral performance properties. Attention mainly paid indicators flammability,...

10.1088/1757-899x/907/1/012060 article EN IOP Conference Series Materials Science and Engineering 2020-08-01

A gas sensor based on ZnO has been designed, which demonstrates sensitivity to NH3 under standard conditions (temperature, 25 °С; pressure, 101.3 kPa). The experimental sample was manufactured by magnetron sputtering at direct current. VUP-5M vacuum unit with an original material-saving used produce films. To analyze the efficiency of ammonia (NH3) conditions, its operating characteristics were studied. concentration for investigating chosen level ppm. determine resistivity contacts...

10.15587/1729-4061.2024.298512 article EN Eastern-European Journal of Enterprise Technologies 2024-02-28

Запропоновано оптимізований метод оцінки вогнезахисної ефективності реактивних пок-риттів, що може бути застосований під час розробки та дослідженні нових рецептур вогнезахис-них складів. Для досягнення поставленої мети проведено критичний аналіз існуючих методів вогнезахисних покриттів, як затверджених нор-мативними документами, так і таких, використовувалися дослідниками для експрес-оцінок засобів. За результатами аналізу переваг недоліків досліджуваних скорочення часу на підготовку оброку...

10.52363/2524-0226-2024-39-9 article UK Problems of Emergency Situations 2024-04-24

Розроблено важкогорючу епоксиуретанову мастику з підвищеними вібродемпфуючими властивостями та необхідними фізико-механічними для облицювання внутрішніх металевих поверхонь рухомого складу залізничного транспорту. В якості полімерної матриці використовували епоксиуретанові сітчасті полімери. Для зниження горючості вогнезахисну добавку поліфосфат амонію, надання тиксотропних властивостей – наповнювач із гідрофобізованою поверхнею Аеросил. Як метод дослідження в’язкопружних застосовували...

10.52363/2524-0226-2024-39-20 article UK Problems of Emergency Situations 2024-04-24

Abstract The paper presents a study on the development of thin-layer thermal (with conductivity coefficient ranging from 0.0416 to 0.083 W/(m·K)) insulation coatings based styrene-acrylic aqueous dispersion with improved adhesion properties and regulated technological characteristics. simplicity speed applying liquid provide significant advantages over standard insulating materials. An advantage is ability insulate surfaces complex configuration.

10.1088/1755-1315/1376/1/012033 article EN IOP Conference Series Earth and Environmental Science 2024-07-01

The object of this study is the process liquid combustion in spillage, and subject temperature distribution along wall a vertical steel tank when it heated under thermal influence fire cooled by water. A system equations describing water cooling conditions effect spilling flammable has been constructed. consists heat balance equation for wall, film flowing over mass film. take into account radiative exchange with flame, environment, internal space tank, as well convective surrounding air,...

10.15587/1729-4061.2024.313827 article EN Eastern-European Journal of Enterprise Technologies 2024-10-25

Intumescent fire-retardant coatings based on epoxy resins, compared to traditional compositions, have improved performance properties – high strength, chemical and atmospheric resistance, adhesion many materials. However, unmodified polymers are combustible obtain IFR them, flame retardants mineral fillers added their composition. systems for retardant oligomers (non-halogen-containing) usually consist of ammonium or ammophos polyphosphate as an acidic agent a wide range fillers, both inert...

10.4028/www.scientific.net/msf.1038.539 article EN Materials science forum 2021-07-13

10.18429/jacow-srf2019-thp002 preprint EN HAL (Le Centre pour la Communication Scientifique Directe) 2019-06-30

Досліджено кратність спучення коксового шару епоксиполімерів наповнених поліфосфатом амонію та цільовими наповнювачами. У якості об’єкту дослідження використовували композиції на основі епоксидного плівкоутворювача, затверділі поліетиленполіаміном. цільових наповнювачів – пентаеритрит терморозширюваний графіт як додаткове джерело вуглецю, гідроксид алюмінію газоутворювач аеросил у згущувача. Дослідження проводили згідно теорії планування експериментів з побудовою ортогональних композиційних...

10.52363/2524-0226-2022-36-6 article UK Problems of Emergency Situations 2022-11-25

The object of research is the process fat oxidation at elevated and standard temperatures. Fats are used in chemical, pharmaceutical, food other industries. Oxidative deterioration changes composition fats, reduces efficiency chemical reactions involving fats quality final products. An urgent task to increase oxidative stability fats. compositions based on rapeseed, high-oleic sunflower palm oils by induction period a temperature 110 °C was investigated. periods initial were 408.48 min.,...

10.15587/1729-4061.2023.272210 article EN Eastern-European Journal of Enterprise Technologies 2023-02-28

This paper is an overview of the metallographic polishing R&D program covering Niobium and Copper substrates treatment for thin film coating as alternative fabrication pathway 1.3 GHz elliptical cavities. The presented research result a collaborative effort between IJCLab, CEA/Irfu, HZB, KEK in order to develop innovative surface processing cavity protocols capable meeting stringent requirements SRF surfaces, including reduction safety risks ecological footprint, enhancing reliability,...

10.48550/arxiv.2307.03272 preprint EN cc-by arXiv (Cornell University) 2023-01-01

The object of research is intumescent fire retardant coatings based on epoxy resins. aimed at the development mathematical models dependence swelling rate their composition. Considering complexity processes during formation a protective carbon layer, it advisable to select optimal ratio components an coating experimentally, followed by construction dependences Therefore, experimental studies developing and optimizing composition polymers are important task. were carried out in accordance...

10.15587/2706-5448.2021.237982 article EN Technology audit and production reserves 2021-07-31
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