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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">10.31143/2221-7789-2024-1-05-10</article-id><article-id custom-type="edn" pub-id-type="custom">FFRFGC</article-id><article-id custom-type="elpub" pub-id-type="custom">ikbgu-68</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>Физика</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Physics</subject></subj-group></article-categories><title-group><article-title>ОСОБЕННОСТИ ПОЛИМОРФИЗМА н-АЛКАНОВ ПРИ ТЕМПЕРАТУРНЫХ ФАЗОВЫХ ПЕРЕХОДАХ</article-title><trans-title-group xml:lang="en"><trans-title>FEATURES OF n-ALKANE POLYMORPHISM DURING TEMPERATURE PHASE TRANSITIONS</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>Гурьева</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gureva</surname><given-names>S. A.</given-names></name></name-alternatives><email xlink:type="simple">swet.gurjewa@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>Марихин</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Marikhin</surname><given-names>V. A.</given-names></name></name-alternatives><email xlink:type="simple">swet.gurjewa@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>Власова</surname><given-names>Е. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Vlasova</surname><given-names>E. N.</given-names></name></name-alternatives><email xlink:type="simple">swet.gurjewa@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Физико-технический институт им. А.Ф. Иоффе РАН</institution></aff><aff xml:lang="en"><institution>A.F. Ioffe Physico-Technical Institute RAS</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт высокомолекулярных соединений РАН</institution></aff><aff xml:lang="en"><institution>Institute of Macromolecular Compounds</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>30</day><month>03</month><year>2024</year></pub-date><volume>14</volume><issue>1</issue><fpage>5</fpage><lpage>10</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гурьева С.А., Марихин В.А., Власова Е.Н., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Гурьева С.А., Марихин В.А., Власова Е.Н.</copyright-holder><copyright-holder xml:lang="en">Gureva S.A., Marikhin V.A., Vlasova E.N.</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/68">https://www.izvestiakbsu.ru/jour/article/view/68</self-uri><abstract><p>Методом ИК Фурье – спектроскопии исследованы различия кинетики полиморфного превращения кристаллографических фаз н-алканов разной чётности: трикозана С23Н48 и тетракозана С24Н50. Установлено, что структурный фазовый переход I рода происходит с изменением типа симметрии исходных орторомбических или триклинных суб-ячеек на гексагональные посредством формирования ряда промежуточных ротационных фаз (RI, RII, RV) в зависимости от симметрии молекул (цис- или транс-).</p></abstract><trans-abstract xml:lang="en"><p>Differences in the kinetics of polymorphic transformation of crystallographic phases of different parity n- alkanes: tricosane C23H48 and tetracosane C24H50 were studied by FTIR spectroscopy. It has been established that a first-order structural phase transition occurs with a change in the symmetry type of the initial orthorhombic or triclinic sub-cells to hexagonal ones through the formation of a number of intermediate rotator phases (RI, RII, RV) depending on the symmetry of the molecules.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>н-алкан</kwd><kwd>ламель</kwd><kwd>фазовый переход</kwd><kwd>ротационная фаза</kwd><kwd>ИК-спектроскопия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>n-alkane</kwd><kwd>lamella</kwd><kwd>phase transition</kwd><kwd>rotator phase</kwd><kwd>IR-spectroscopy</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">Егоров В.М., Борисов А.К., Марихин В.А. Анализ процесса образования нанозародышей при структурном фазовом переходе в молекулярных кристаллах нормальных алканов // ФТТ. 2021. 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