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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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.47612/0514-7506-2022-89-6-824-829</article-id><article-id custom-type="elpub" pub-id-type="custom">zhps-1171</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Продольная релаксация ядерной намагниченности в растворах каучуков: протоны полиизопрена</article-title><trans-title-group xml:lang="en"><trans-title>Longitudinal Relaxation of Nuclear Magnetization in Rubber Solutions: Polyisoprene Protons</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>Махиянов</surname><given-names>Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Makhiyanov</surname><given-names>N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Нижнекамск</p></bio><bio xml:lang="en"><p>Nizhnekamsk</p></bio><email xlink:type="simple">nail-nk@rambler.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>Ефимов</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Efimov</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Казань</p></bio><bio xml:lang="en"><p>Kazan</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ПАО “Нижнекамскнефтехим”</institution></aff><aff xml:lang="en"><institution>Public Joint-Stock Company “Nizhnekamskneftekhim”</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт физики Казанского федерального университета</institution></aff><aff xml:lang="en"><institution>Institute of Physics of the Kazan State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>28</day><month>11</month><year>2022</year></pub-date><volume>89</volume><issue>6</issue><fpage>824</fpage><lpage>829</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Махиянов Н., Ефимов С.В., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Махиянов Н., Ефимов С.В.</copyright-holder><copyright-holder xml:lang="en">Makhiyanov N., Efimov S.V.</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://zhps.ejournal.by/jour/article/view/1171">https://zhps.ejournal.by/jour/article/view/1171</self-uri><abstract><p>Селективно (для различных структурных групп) измерены времена продольной (спинрешеточной) релаксации Т1 протонов при частоте ядерного магнитного резонанса 700 МГц в растворе промышленного образца изопренового каучука Cariflex-IR0307 в дейтерированном бензоле. Показано, что величина Т1 существенно зависит от структурного положения в цепи полиизопрена. Наибольшие значения Т1 получены при двойных связях мономерных звеньев в цис-конфигурации и метильной группы транс-звена, наименьшие — для метинового и метиленовых протонов 3,4-звена, с различием в два-три раза. Рассмотрены вопросы точности измерений. Сформулированы практические рекомендации для условий регистрации спектров высокого разрешения ЯМР 1Н при количественном анализе структуры изопреновых каучуков. </p></abstract><trans-abstract xml:lang="en"><p>The longitudinal (spin-lattice) relaxation times of Т1 of protons are measured selectively (for various structural groups) at a nuclear magnetic resonance frequency of 700 MHz in a solution of an industrial sample of Cariflex-IR0307 isoprene rubber in deuterated benzene. It is shown that the value of T1 significantly depends on the structural position in the polyisoprene chain. The highest values of T1 are obtained at double bonds of monomer units in the cis-configuration and the methyl group of the trans-unit, the smallest values were obtained for the methine and methylene protons of the 3,4-unit, with a difference of two to three times. The questions of measurement accuracy are considered. Practical recommendations are formulated for the conditions of recording high-resolution NMR1H spectra at quantitative analysis of the structure of isoprene rubbers. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>ядерный магнитный резонанс</kwd><kwd>продольная (спин-решеточная) релаксация ЯМР</kwd><kwd>точность измерений</kwd><kwd>полиизопрен</kwd><kwd>изопреновый каучук</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nuclear magnetic resonance</kwd><kwd>longitudinal (spin-lattice) NMR relaxation</kwd><kwd>measurement accuracy</kwd><kwd>polyisoprene</kwd><kwd>isoprene rubber</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">G. J. Ray, C. M. Szabo. eMagRes, 2, N 2 (2013) 193—204</mixed-citation><mixed-citation xml:lang="en">G. J. Ray, C. M. 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