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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">ikbgu</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Кабардино-Балкарского государственного университета</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the Kabardino-Balkarian State University</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2221-7789</issn><publisher><publisher-name>Kabardino-Balkarian State University named after Kh. M. Berbekov</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31143/2221-7789-2023-4-103-109</article-id><article-id custom-type="edn" pub-id-type="custom">DMLJFH</article-id><article-id custom-type="elpub" pub-id-type="custom">ikbgu-171</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>Химия</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Chemistry</subject></subj-group></article-categories><title-group><article-title>ИССЛЕДОВАНИЕ МЕХАНИЧЕСКИХ СВОЙСТВ ПОЛИЭФИРЭФИРКЕТОНА И ЕГО СОПОЛИМЕРА В ШИРОКОМ ДИАПАЗОНЕ ТЕМПЕРАТУР</article-title><trans-title-group xml:lang="en"><trans-title>STUDY OF THE MECHANICAL PROPERTIES OF POLYETHERETHERKETONE AND POLYETHERETHERKETONE COPOLYMER IN A WIDE TEMPERATURE RANGE</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>Ржевская</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Rzhevskaya</surname><given-names>E. V.</given-names></name></name-alternatives><email xlink:type="simple">elena.r-1382@mail.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>Тлупов</surname><given-names>А. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Tlupov</surname><given-names>A. F.</given-names></name></name-alternatives><email xlink:type="simple">elena.r-1382@mail.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>Слонов</surname><given-names>А. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Slonov</surname><given-names>A. L.</given-names></name></name-alternatives><email xlink:type="simple">elena.r-1382@mail.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>Жанситов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhansitov</surname><given-names>A. A.</given-names></name></name-alternatives><email xlink:type="simple">elena.r-1382@mail.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>Давыдова</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Davydova</surname><given-names>V. V.</given-names></name></name-alternatives><email xlink:type="simple">elena.r-1382@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хаширова</surname><given-names>С. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Khashirova</surname><given-names>S. Yu.</given-names></name></name-alternatives><email xlink:type="simple">elena.r-1382@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Кабардино-Балкарский государственный университет им. Х.М. Бербекова</institution></aff><aff xml:lang="en"><institution>Kabardino-Balkarian State University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Российский государственный университет туризма и сервиса</institution></aff><aff xml:lang="en"><institution>Russian State University of Tourism and Service</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>30</day><month>12</month><year>2023</year></pub-date><volume>13</volume><issue>4</issue><fpage>103</fpage><lpage>109</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ржевская Е.В., Тлупов А.Ф., Слонов А.Л., Жанситов А.А., Давыдова В.В., Хаширова С.Ю., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Ржевская Е.В., Тлупов А.Ф., Слонов А.Л., Жанситов А.А., Давыдова В.В., Хаширова С.Ю.</copyright-holder><copyright-holder xml:lang="en">Rzhevskaya E.V., Tlupov A.F., Slonov A.L., Zhansitov A.A., Davydova V.V., Khashirova S.Y.</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://www.izvestiakbsu.ru/jour/article/view/171">https://www.izvestiakbsu.ru/jour/article/view/171</self-uri><abstract><p>В работе впервые проведены сравнительные исследования механических свойств полиэфирэфир- кетона и его сополимера на основе гидрохинона и 4,4'-дигидроксидифенила в широком диапазоне температур испытания. Выявлены основные закономерности поведения данных материалов в интервале температур от –65 до 250 °С. Показано, что гомополимер обладает более высокими механическими свойствами во всем диапазоне температур испытания; оба материала сохраняют пластичность при низких температурах. Обнаружено, что при температуре выше 150 °С происходит резкое снижение механических свойств, что связано с переходом исследуемых материалов в высокоэластическое состояние вследствие достижения температуры стеклования.</p></abstract><trans-abstract xml:lang="en"><p>In this work, for the first time, comparative studies of the mechanical properties of polyetheretherketone and its copolymer based on hydroquinone and 4,4'-dihydroxybiphenyl were carried out in a wide range of test temperatures. The main regularities of the behavior of these materials in the temperature range from –65 °С to +250 °С are revealed; that the homopolymer has higher mechanical properties throughout the whole range of test temperatures. It is shown that both materials retain plasticity at low temperatures. It was found that at temperatures above 150 °C, a sharp decrease in mechanical properties occurs, which is associated with the transition of the studied materials into a highly elastic state due to the glass transition temperature.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>полиэфирэфиркетон</kwd><kwd>сополимер полиэфирэфиркетона</kwd><kwd>физико-механические свойства</kwd><kwd>термические свойства.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>polyetheretherketone</kwd><kwd>polyetheretherketone copolymer</kwd><kwd>physical and mechanical properties</kwd><kwd>thermal properties.</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">Михайлин Ю.А. Термоустойчивые полимеры и полимерные материалы. СПб.: Профессия, 2006. 624 с.</mixed-citation><mixed-citation xml:lang="en">Михайлин Ю.А. 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