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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 custom-type="elpub" pub-id-type="custom">zhps-687</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>ИССЛЕДОВАНИЕ ВОССТАНОВИТЕЛЬНОЙ ДЕСТРУКЦИИ ЛИГНИНА МЕТОДОМ ИК-СПЕКТРОСКОПИИ</article-title><trans-title-group xml:lang="en"><trans-title>STUDY OF REDUCING DESTRUCTION OF LIGNIN BY FT-IR SPECTROSCOPY</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>Алеева</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Aleeva</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>153045, Иваново</p></bio><bio xml:lang="en"><p>Ivanovo, 153045</p></bio><email xlink:type="simple">sva@isc-ras.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>Лепилова</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lepilova</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>153045, Иваново</p></bio><bio xml:lang="en"><p>Ivanovo, 153045</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кокшаров</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Koksharov</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>153045, Иваново</p></bio><bio xml:lang="en"><p>Ivanovo, 153045</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт химии растворов им. Г. А. Крестова Российской АН</institution></aff><aff xml:lang="en"><institution>G. A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>29</day><month>10</month><year>2020</year></pub-date><volume>87</volume><issue>5</issue><fpage>694</fpage><lpage>699</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Алеева С.В., Лепилова О.В., Кокшаров С.А., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Алеева С.В., Лепилова О.В., Кокшаров С.А.</copyright-holder><copyright-holder xml:lang="en">Aleeva S.V., Lepilova O.V., Koksharov S.A.</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/687">https://zhps.ejournal.by/jour/article/view/687</self-uri><abstract><p>С применением экстракционного метода Бьеркмана получены препараты лигнина из сурового льняного волокна и материала, подвергнутого воздействию щелочного раствора борогидрида натрия. Идентифицированы пики индивидуальных колебательных процессов всех видов ковалентных связей в функциональных группах биополимера. Подтвержден механизм индуцированной деструкции лигнина в результате дестабилизации эфирной связи, прилегающей к восстанавливаемой карбонильной группе пропанового звена макромолекулы. Восстановление карбонила сопровождается двукратным увеличением интенсивности полосы поглощения алкильных гидроксилов и четырехкратным возрастанием числа оксиарильных группировок, что свидетельствует о накоплении в системе структурных звеньев в свободной фенольной форме. Сопоставлена динамика структурных превращений, оценена продолжительность последовательно-параллельного протекания процессов восстановления и деструкции полимера.</p></abstract><trans-abstract xml:lang="en"><p>Lignin preparations were obtained from harsh flax fiber and material exposed to an alkaline solution of borohydride sodium using the Bjerkman extraction method. Peaks of individual vibrational processes of all types of covalent bonds in the functional groups of the biopolymer were identified. The mechanism of induced lignin destruction as a result of destabilization of the ether bond adjacent to the reduced carbonyl group in the propane link of the macromolecule was confirmed. The reduction of carbonyl is accompanied by a twofold increase in the intensity of the absorption band of alkyl hydroxyls and a fourfold increase in the number of hydroxyaryl groups, which indicates to the accumulation of structural units in the free phenolic form in the system. The dynamics of structural transformations was compared, and the duration of the serial-parallel processes of polymer reduction and destruction was estimated.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ИК-спектроскопия с Фурье-преобразованием</kwd><kwd>лигнин</kwd><kwd>щелочно-восстановительная деструкция</kwd></kwd-group><kwd-group xml:lang="en"><kwd>FT-IR spectroscopy</kwd><kwd>lignin</kwd><kwd>alkaline reducing destruction</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">Y.-Ch. Liu, J.-S. Wang, K.-L. Huang, W. Xu. Polym. Bull., 64 (2010) 159—169; doi: 10.1007/s00289- 009-0150-z</mixed-citation><mixed-citation xml:lang="en">Y.-Ch. Liu, J.-S. Wang, K.-L. Huang, W. Xu. Polym. Bull., 64 (2010) 159—169; doi: 10.1007/s00289- 009-0150-z</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">А. 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