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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">zldm</journal-id><journal-title-group><journal-title xml:lang="ru">Заводская лаборатория. Диагностика материалов</journal-title><trans-title-group xml:lang="en"><trans-title>Industrial laboratory. Diagnostics of materials</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1028-6861</issn><issn pub-type="epub">2588-0187</issn><publisher><publisher-name>ООО «Издательство «ТЕСТ-ЗЛ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26896/1028-6861-2021-87-7-30-37</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-1451</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>ИССЛЕДОВАНИЕ СТРУКТУРЫ И СВОЙСТВ. ФИЗИЧЕСКИЕ МЕТОДЫ ИССЛЕДОВАНИЯ И КОНТРОЛЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TESTING OF STRUCTURE AND PARAMETERS. PHYSICAL METHODS OF TESTING AND QUALITY CONTROL</subject></subj-group></article-categories><title-group><article-title>Исследование свойств стабилизированного термообработанного полиакрилонитрила на воздухе</article-title><trans-title-group xml:lang="en"><trans-title>Study of the properties for stabilized polyacrylonitrile thermally treated in air</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>Козлов</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozlov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Валентинович Козлов</p><p>119991, Ленинский пр., д. 29</p></bio><bio xml:lang="en"><p>Vladimir V. Kozlov</p><p>29, Leninsky pr., Moscow, 119991</p></bio><email xlink:type="simple">kozlov@ips.ac.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>Васильев</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Vasilev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Андрей Александрович Васильев</p><p>119991, Ленинский пр., д. 29</p></bio><bio xml:lang="en"><p>Andrey A. Vasilev</p><p>29, Leninsky pr., Moscow, 119991</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>Горичев</surname><given-names>Н. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorichev</surname><given-names>I. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Игорь Георгиевич Горичев</p><p>119991, ул. Малая Пироговка, д. 1</p></bio><bio xml:lang="en"><p>Igor G. Gorichev</p><p>1, Malaya Pirogovskaya ul., Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калашник</surname><given-names>А. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalashnik</surname><given-names>A. Т.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анатолий Трофимович Калашник</p><p>119991, ул. Малая Пироговка, д. 1</p></bio><bio xml:lang="en"><p>Anatoliy T. Kalashnik</p><p>4, Leninsky prosp., Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Костишин</surname><given-names>В. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Kostishin</surname><given-names>V. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Григорьевич Костишин</p><p>119991, ул. Малая Пироговка, д. 1</p></bio><bio xml:lang="en"><p>Vladimir G. Kostishin</p><p>4, Leninsky prosp., Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Табаров</surname><given-names>Ф. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Tabarov</surname><given-names>F. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Фаррух Саадиевич Табаров</p><p>119991, ул. Малая Пироговка, д. 1</p></bio><bio xml:lang="en"><p>Farruh S. Tabarov</p><p>4, Leninsky prosp., Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Годаев</surname><given-names>Б. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Godaev</surname><given-names>В. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Баин Сергеевич Годаев</p><p>119991, ул. Малая Пироговка, д. 1</p></bio><bio xml:lang="en"><p>Bain S. Godaev</p><p>4, Leninsky prosp., Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ситнов</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sitnov</surname><given-names>М. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михаил Андреевич Ситнов</p><p>119991, ул. Малая Пироговка, д. 1</p></bio><bio xml:lang="en"><p>Mihail A. Sitnov</p><p>4, Leninsky prosp., Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт нефтехимического синтеза имени А. В. Топчиева РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Московский педагогический государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow Pedagogical State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Национальный исследовательский технологический университет «МИСиС»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Science and Technology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>24</day><month>07</month><year>2021</year></pub-date><volume>87</volume><issue>7</issue><fpage>30</fpage><lpage>37</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Козлов В.В., Васильев А.А., Горичев Н.Г., Калашник А.Т., Костишин В.Г., Табаров Ф.С., Годаев Б.С., Ситнов М.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Козлов В.В., Васильев А.А., Горичев Н.Г., Калашник А.Т., Костишин В.Г., Табаров Ф.С., Годаев Б.С., Ситнов М.А.</copyright-holder><copyright-holder xml:lang="en">Kozlov V.V., Vasilev A.A., Gorichev I.G., Kalashnik A.Т., Kostishin V.G., Tabarov F.S., Godaev В.S., Sitnov М.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://www.zldm.ru/jour/article/view/1451">https://www.zldm.ru/jour/article/view/1451</self-uri><abstract><p>Для развития электроники на основе нанотехнологии необходимы новые углеродные нанокристаллические материалы с заранее заданными физико-химическими свойствами. Их можно получить, например, путем синтеза при термообработке полиакрилонитрила (ПАН). В работе представлены результаты исследования свойств термообработанного на воздухе в диапазоне температур 150 – 250 °C ПАН и влияния стабилизации на кинетические параметры синтеза и термохимические свойства углеродного материала при термической обработке в атмосфере азота. Установлено, что увеличение температуры предварительной обработки до 220 °C приводит к уменьшению энергии активации и предэкспоненциального множителя по сравнению с исходным полимером (с 90,9 и 3,1 · 106 до 53,3 кДж/моль и 1,1 · 103 мин–1 соответственно). Это подтверждает возникновение диффузионных ограничений. При росте температуры предварительного нагрева со 180 до 250 °C разница между температурами пиков на кривой ДСК и ТГА снижается вследствие возникновения структуры «ядро – оболочка». Кроме того, при повышении температуры до 150 °C исходная структура полимера не меняется. Однако по мере дальнейшего ее роста происходят существенные изменения в исходной структуре ПАН, которые проявляются в уменьшении площади пика на рентгенограмме полимера. Полученные результаты могут быть использованы при разработке метода синтеза углеродного материала с контролируемыми свойствами, определяемыми на стадии стабилизации.</p></abstract><trans-abstract xml:lang="en"><p>Developing of nanotechnology-based electronics entails developing of new carbon nanocrystalline materials with predetermined physicochemical properties, e.g., obtained by synthesis of polyacrylonitrile (PAN) in conditions of heat treatment. We have studied the properties of PAN heat-treated in air in the temperature range 150 – 250°C and the effect of stabilization on the kinetic parameters of synthesis and thermochemical properties of carbon material upon heat treatment in N2 atmosphere. It is shown that an increase in the temperature of a preliminary treatment up to 200°C leads to a decrease in the activation energy and pre-exponential factor compared to the corresponding values characteristic for the initial polymer (from 90.9 and 3.1 × 106 to 53.3 kJ/mol and 1.1 × 103 min–1, respectively), which indicates to the occurrence of diffusion limitations. When the temperature of a preliminary treatment in air increases from 180 to 250°C, the difference between temperature peaks for DSC and TGA curves decreases due to appearance of a «core-shell» structure. XRD data indicate that the initial PAN structure does not change up to 150°C. Further increase in the temperature leads to significant changes in the initial structure of the polymer which are manifested in a decrease in the peak area in the X-ray diffraction pattern of the polymer. The results obtained can be used in the development of a method for the synthesis of carbon materials with controlled properties predetermined at the stage of stabilization.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>кинетика</kwd><kwd>полиакрилонитрил</kwd><kwd>стабилизация</kwd><kwd>мезофаза</kwd><kwd>ИК-спектр</kwd></kwd-group><kwd-group xml:lang="en"><kwd>kinetics</kwd><kwd>polyacrylonitrile</kwd><kwd>stabilization</kwd><kwd>mesophase</kwd><kwd>IR spectrum</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">Morris E. A., Weisenberger M. C., Abdallah M. G., Vautard F. S., et al. High performance carbon fibers from very high molecular weight polyacrylonitrile precursors / Carbon. 2016. Vol. 101. P. 245 – 252. DOI: 10.1016/j.carbon.2016.01.104</mixed-citation><mixed-citation xml:lang="en">Morris E. A., Weisenberger M. C., Abdallah M. G., Vautard F. S., et al. High performance carbon fibers from very high molecular weight polyacrylonitrile precursors / Carbon. 2016. Vol. 101. P. 245 – 252. DOI: 10.1016/j.carbon.2016.01.104</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Казарян С. А., Стародубцев Н. Ф. Исследование оптических и люминесцентных свойств углеродных наночастиц методом микрофотолюминесценции / Перспективные материалы. 2019. № 8. С. 5 – 21. DOI: 10.30791/1028-978X-2019-8-5-21</mixed-citation><mixed-citation xml:lang="en">Kazaryan S. A., Starodubtsev N. F. Study of the optical and luminescent properties of carbon nanoparticles using the microphotoluminescence method / Persp. Mater. 2019. N 8. P. 5 – 21. DOI: 10.30791/1028-978X-2019-8-5-21 [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Fu Z., Gui Y., Cao C., Liu B., et al. Structure evolution and mechanism of polyacrylonitrile and related copolymers during the stabilization / J. Mater. Sci. 2014. Vol. 49. P. 2864 – 2874. DOI: 10.1007/s10853-013-7992-3</mixed-citation><mixed-citation xml:lang="en">Fu Z., Gui Y., Cao C., Liu B., et al. Structure evolution and mechanism of polyacrylonitrile and related copolymers during the stabilization / J. Mater. Sci. 2014. Vol. 49. P. 2864 – 2874. DOI: 10.1007/s10853-013-7992-3</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Земцов Л. М., Карпачева Г. П. Химические превращения полиакрилонитрила под действием ИК излучения / Высокомолек. соед. А. 1994. Т. 36. № 6. С. 919 – 924.</mixed-citation><mixed-citation xml:lang="en">Zemtsov L. M., Karpacheva G. P. Chemical transformations of polyacrylonitrile under IR radiation / Vysokomolek. Soed. A. 1994. Vol. 36. N 6. P. 919 – 924 [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Ghorpade R. V., Cho D. W., Hong S. C. Effect of controlled tacticity of polyacrylonitrile (co)polymers on their thermal oxidative stabilization behaviors and the properties of resulting carbon films / Carbon. 2017. Vol. 121. P. 502 – 511. DOI: 10.1016/j.carbon.2017.06.015</mixed-citation><mixed-citation xml:lang="en">Ghorpade R. V., Cho D. W., Hong S. C. Effect of controlled tacticity of polyacrylonitrile (co)polymers on their thermal oxidative stabilization behaviors and the properties of resulting carbon films / Carbon. 2017. Vol. 121. P. 502 – 511. DOI: 10. 1016/j.carbon.2017.06.015</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Zhao R., Sun P., Liu R., Ding Z. Influence of heating procedures on the surface structure of stabilized polyacrylonitrile fibers / Appl. Surface Sci. 2018. Vol. 433. P. 321 – 328. DOI: 10.1016/j.apsusc.2017.09.252</mixed-citation><mixed-citation xml:lang="en">Zhao R., Sun P., Liu R., Ding Z. Influence of heating procedures on the surface structure of stabilized polyacrylonitrile fibers / Appl. Surface Sci. 2018. Vol. 433. P. 321 – 328. DOI: 10.1016/j.apsusc.2017.09.252</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Sha Y., Liu W., Lil Y., Cao W. Formation Mechanism of Skin–Core Chemical Structure within Stabilized Polyacrylonitrile Monofilaments / Nanoscale Research Letters. 2019. Vol. 14. P. 1 – 7. DOI: 10.1186/s11671-019-2926-x</mixed-citation><mixed-citation xml:lang="en">Sha Y., Liu W., Lil Y., Cao W. Formation Mechanism of Skin–Core Chemical Structure within Stabilized Polyacrylonitrile Monofilaments / Nanoscale Research Letters. 2019. Vol. 14. P. 1 – 7. DOI: 10.1186/s11671-019-2926-x</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Rahaman M., Ismail A., Mustafa A. A review of heat treatment on polyacrylonitrile fiber / Polym. Degrad. Stab. 2007. Vol. 92. Issue 8. P. 1421 – 1432. DOI: 10.1016/j.polymdegradstab.2007.03.023</mixed-citation><mixed-citation xml:lang="en">Rahaman M., Ismail A., Mustafa A. A review of heat treatment on polyacrylonitrile fiber / Polym. Degrad. Stab. 2007. Vol. 92. Issue 8. P. 1421 – 1432. DOI: 10.1016/j.polymdegradstab.2007.03.023</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Szepcsika B., Pukanszkya B. The mechanism of thermal stabilization of polyacrylonitrile / Thermochim. Acta. 2019. Vol. 671. P. 200 – 208. DOI: 10.1016/j.polymdegradstab.2007.03.023</mixed-citation><mixed-citation xml:lang="en">Szepcsika B., Pukanszkya B. The mechanism of thermal stabilization of polyacrylonitrile / Thermochim. Acta. 2019. Vol. 671. P. 200 – 208. DOI: 10.1016/j.polymdegradstab.2007.03.023</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Шульга Ю. М., Рубцов В. И., Ефимов О. Н., Карпачева Г. П. и др. Изучение пиролизованных пленок полиакрилонитрила методами рентгеновской фотоэлектронной спектроскопии, электронной оже-спектроскопии и спектроскопии потерь энергии электронов / Высокомолек. соед. А. 1996. Т. 38. № 6. С. 989 – 992.</mixed-citation><mixed-citation xml:lang="en">Shulga Yu. M., Rubtsov V. I., Efimov O. N., Karpacheva G. P., et al. Studying pyrolyzed polyacrylonitrile films by X-ray photon spectroscopy, Auger spectroscopy and electron energy loss spectroscopy / Vysokomolek. Soed. A. 1996. Vol. 38. N 6. P. 989 – 992 [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Su C., Gao A., Luo S., Xu L. The effect of heat treatment on the electrical conductivity of highly conducting graphene films / Carbon. 2013. Vol. 51. P. 436. DOI: 10.1016/j.carbon.2012.08.034</mixed-citation><mixed-citation xml:lang="en">Su C., Gao A., Luo S., Xu L. The effect of heat treatment on the electrical conductivity of highly conducting graphene films / Carbon. 2013. Vol. 51. P. 436. DOI: 10.1016/j.carbon.2012.08.034</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Nunna S., Naebe M., Hameed N., Creighton C., Naghashian S., Jennings M., Atkiss S., Setty M., Fox B. Investigation of progress of reactions and evolution of radial heterogeneity in the initial stage of thermal stabilization of PAN precursor fibres / Polym. Degrad. Stab. 2016. Vol. 125. P. 105 – 114. DOI: 10.1016/j.polymdegradstab.2016.01.008</mixed-citation><mixed-citation xml:lang="en">Nunna S., Naebe M., Hameed N., Creighton C., Naghashian S., Jennings M., Atkiss S., Setty M., Fox B. Investigation of progress of reactions and evolution of radial heterogeneity in the initial stage of thermal stabilization of PAN precursor fibres / Polym. Degrad. Stab. 2016. Vol. 125. P. 105 – 114. DOI: 10.1016/j.polymdegradstab.2016.01.008</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Селиванов В. Н., Смыслов Е. Ф. Рентгенографический анализ распределения сферических кристаллитов / Кристаллография. 1993. Т. 38. № 3. С. 174 – 180.</mixed-citation><mixed-citation xml:lang="en">Selivanov V. N., Smyslov E. F. X-ray analysis of distributing spherical crystals / Kristallografiya. 1993. Vol. 38. N 3. P. 174 – 180 [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Козлов В. В., Горичев И. Г., Петров В. С., Лайнер Ю. А. Моделирование кинетики процессов при синтезе нанокомпозита Cu/C / Химическая технология. 2008. № 11. С. 556 – 559.</mixed-citation><mixed-citation xml:lang="en">Kozlov V. V., Gorichev I. G., Petrov V. S., Lainer Yu. A. Simulation of kinetics for processes in synthesizing nanocomposite Cu/C / Khim. Tekhnol. 2008. N 11. P. 556 – 559 [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Дельмон Б. Кинетика гетерогенных реакций. — М.: Мир. 1972. — 556 с.</mixed-citation><mixed-citation xml:lang="en">Delmon B. Kinetics of heterogeneous reactions. — Moscow: Mir, 1972. — 556 p. [Russian translation].</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Браун М., Доллимор Д., Галвей А. Реакции твердых тел. — М.: Мир, 1983. — 360 с.</mixed-citation><mixed-citation xml:lang="en">Braun M., Dollimor D., Galvei A. Reactions of solids. — Moscow: Mir, 1983. — 360 p. [Russian translation].</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Розовский А. Я. Гетерогенные химические реакции. — М.: Наука. 1980. — 323 с.</mixed-citation><mixed-citation xml:lang="en">Rozovsky A. Ya. Heterogeneous chemical reactions. — Moscow: Nauka. 1980. — 323 p. [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Козлов В. В., Королев Ю. М., Карпачева Г. П. Структурные превращения композитов на основе полиакрилонитрила и фуллерена C60 под воздействием ИК-излучения / Высокомолек. соед. А. 1999. Т. 41. № 5. С. 836 – 840.</mixed-citation><mixed-citation xml:lang="en">Kozlov V. V., Korolev Yu. M., Karpacheva G. P. Structure transformations of composites based on polyacrylonitrile and fullerene C60 under IR radiation / Vysokomolek. Soed. A. 1999. Vol. 41. N 5. P. 836 – 840 [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Grynova G., Hodgson J., Coote M. Revising the mechanism of polymer autooxidation / Org. Biomol. Chem. 2011. Vol. 9. P. 480 – 490. DOI: 10.1039/C0OB00596G</mixed-citation><mixed-citation xml:lang="en">Grynova G., Hodgson J., Coote M. Revising the mechanism of polymer autooxidation / Org. Biomol. Chem. 2011. Vol. 9. P. 480 – 490. DOI: 10.1039/C0OB00596G</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Nunna S., Creighton C., Hameed N., Naebe M., Henderson L. Radial structure and property relationship in the thermal stabilization of PAN precursor fibres / Polymer Testing. 2017. Vol. 59. P. 203 – 211. DOI: 10.1016/j.polymertesting.2017.02.006</mixed-citation><mixed-citation xml:lang="en">Nunna S., Creighton C., Hameed N., Naebe M., Henderson L. Radial structure and property relationship in the thermal stabilization of PAN precursor fibres / Polymer Testing. 2017. Vol. 59. P. 203 – 211. DOI: 10.1016/j.polymertesting.2017.02.006</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Калашник А. Т., Смирнова Т. Н., Чернова О. П., Козлов В. В. Свойства и структура полиакрильных волокон / Высокомолек. соед. А. 2010. Vol. 52. № 11. С. 2038 – 2043.</mixed-citation><mixed-citation xml:lang="en">Kalashnik A. T., Smirnova T. N., Chernova O. P., Kozlov V. V. Properties and structure of polyacrylonitrile fibres / Vysokomolek. Soed. A. 2010. Vol. 52. N 11. P. 2038 – 2043 [in Russian].</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
