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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vestich</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия химических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Chemical Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8331</issn><issn pub-type="epub">2524-2342</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8331-2025-61-2-154-164</article-id><article-id custom-type="elpub" pub-id-type="custom">vestich-952</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ТЕХНИЧЕСКАЯ ХИМИЯ И ХИМИЧЕСКАЯ ТЕХНОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TECHNICAL CHEMISTRY AND CHEMICAL ENGINEERING</subject></subj-group></article-categories><title-group><article-title>Изменение химического состава авиационных масел при их термоконверсии</article-title><trans-title-group xml:lang="en"><trans-title>Changes in the chemical composition of aviation oils during their thermal conversion</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Василевич</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vasilevich</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Василевич Сергей Владимирович – кандидат технических наук, ведущий научный сотрудник.</p><p>ул. Уборевича, 77, 220072, Минск</p></bio><bio xml:lang="en"><p>Siarhei V. Vasilevich – Ph. D. (Engineering), Leading Researcher, Belarusian State Aviation Academy.</p><p>77, Uborevich Str., 220072, Minsk</p></bio><email xlink:type="simple">svasilevich@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шапорова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shaporova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шапорова Елена Анатольевна – кандидат химических наук, доцент кафедры.</p><p>ул. Уборевича, 77, 220072, Минск</p></bio><bio xml:lang="en"><p>Elena A. Shaporova – Ph. D. (Chemical), Associate Professor of the Department, Belarusian State Aviation Academy.</p><p>77, Uborevich Str., 220072, Minsk</p></bio><email xlink:type="simple">elena.telushenko@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Стойко</surname><given-names>С. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Stoiko</surname><given-names>S. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Стойко Сергей Олегович – начальник центра.</p><p>ул. Уборевича, 77, 220072, Минск</p></bio><bio xml:lang="en"><p>Sergey O. Stoiko – Head of the Center, Belarusian State Aviation Academy.</p><p>77, Uborevich Str., 220072, Minsk</p></bio><email xlink:type="simple">sergey_14_95@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусская государственная академия авиации</institution></aff><aff xml:lang="en"><institution>Belarusian State Aviation Academy</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>29</day><month>05</month><year>2025</year></pub-date><volume>61</volume><issue>2</issue><fpage>154</fpage><lpage>164</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Василевич С.В., Шапорова Е.А., Стойко С.О., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Василевич С.В., Шапорова Е.А., Стойко С.О.</copyright-holder><copyright-holder xml:lang="en">Vasilevich S.V., Shaporova E.A., Stoiko S.O.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestichem.belnauka.by/jour/article/view/952">https://vestichem.belnauka.by/jour/article/view/952</self-uri><abstract><p>Представлены результаты экспериментальных исследований изменения химического состава авиационных масел при их термоконверсии. В качестве объектов исследований выступают авиационные масла, широко применяемые в авиационной отрасли Республики Беларусь: МС-8П, ТУРБОНИКОЙЛ 98 (ТН 98) и ТУРБОНИКОЙЛ 600 (ТН 600). Приведено описание условий эксплуатации масел, включая термические режимы. Отмечено, что хотя рассматриваемые масла обладают термической стабильностью в широком температурном интервале, на различных этапах эксплуатации они подвергаются перегревам, приводящим к количественному изменению углеводородного состава, что может способствовать значительному снижению смазывающих свойств, образованию и накоплению механических загрязнений в узлах трения, образованию дефектов и разрушению элементов узлов трения. В ходе исследования определялся химический состав исходных масел, после чего масла прогревались в течение определенного периода. Температурные режимы нагрева выбраны в диапазоне от максимальных рабочих температур, в которых используются эти масла, до минимальных температур вспышки. Для удобства компоненты масел были разделены на восемь групп компонентов. Представлен анализ изменения процентного содержания групп компонентов исследованных масел при их прогреве. Показано влияние времени нагрева на компонентный состав указанных образцов. Полученные результаты могут быть полезны при моделировании работы узлов трения авиационных двигателей и прогнозировании изменений показателей качества масел в условиях их эксплуатации.</p></abstract><trans-abstract xml:lang="en"><p>The paper describes experimental studies of changes in the chemical composition of aviation oils during their thermal conversion. Aviation oils widely used in the aviation industry of the Republic of Belarus were taken as research objects: MS-8P, TURBONIKOIL 98 (TN 98) and TURBONIKOIL 600 (TN 600). A description of the operating conditions of oils, including thermal conditions, is provided. It is noted that, although the oils in question are thermally stable over a wide temperature range, at various stages of operation they might be overheated, leading to a quantitative change in the hydrocarbon composition. This can lead to a significant decrease in lubricating properties, the formation and accumulation of mechanical impurities in the friction unit, the formation of defects, and destruction of friction unit elements. A description of the methodology for determining the quantitative and qualitative analysis is presented. During the study, the chemical composition of the starting oils was determined, after which the oils were heated for a certain period of time. Warm-up temperatures were selected from the maximum operating temperatures at which these oils are used to the minimum flash points. For convenience, the oil components were divided into eight groups of components. An analysis of changes in the percentage of groups of components of the studied oils during their heating is presented. The effect of heating time on the component composition of these samples is shown, esters, additives and other organic compounds are determined. The results obtained can be useful in modeling the operation of friction units of aircraft engines and predicting changes in oil quality indicators under operating conditions.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>авиационные масла</kwd><kwd>химический состав</kwd><kwd>газовая хромато-масс-спектрометрия</kwd><kwd>термоконверсия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>aviation oils</kwd><kwd>chemical composition</kwd><kwd>gas chromatography-mass spectrometry</kwd><kwd>thermal conversion</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Study on rheological properties of aviation lubricating oil under conditions of heavy load, high speed, and high temperature / Z. Li, X. Zhao, D. 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