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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8323-2026-70-5-424-431</article-id><article-id custom-type="elpub" pub-id-type="custom">dan-1336</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>ТЕХНИЧЕСКИЕ НАУКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TECHNICAL SCIENCES</subject></subj-group></article-categories><title-group><article-title>Влияние малых добавок алифатического поликетона на структуру и свойства полиамида 6</article-title><trans-title-group xml:lang="en"><trans-title>Effect of small additives of aliphatic polyketone on the structure and properties of polyamide 6</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1182-6938</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кривогуз</surname><given-names>Ю. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Krivoguz</surname><given-names>Yu. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кривогуз Юрий Михайлович – д-р техн. наук, доцент, директор</p><p>ул. Кирова, 32а, 246050, Гомель </p></bio><bio xml:lang="en"><p>Krivoguz Yuri M. – D. Sc (Engineering), Associate Professor, Director</p><p>2a, Kirov Str., 246050, Gomel </p></bio><email xlink:type="simple">krivoguz@mpri.org.by</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>Усова</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Usova</surname><given-names>V. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Усова Виктория Николаевна – мл. науч. сотрудник, аспирант</p><p>ул. Кирова, 32а, 246050, Гомель </p></bio><bio xml:lang="en"><p>Usova Viktoriya N. – Junior Researcher, Postgraduate Student</p><p>2a, Kirov Str., 246050, Gomel </p></bio><email xlink:type="simple">viktoriya.usovav@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт механики металлополимерных систем имени В. А. Белого Национальной академии наук Беларуси</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>V. A. Belyi Metal-Polymer Research Institute of the National Academy of Sciences of Belarus</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>13</day><month>11</month><year>2026</year></pub-date><volume>70</volume><issue>5</issue><fpage>424</fpage><lpage>431</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кривогуз Ю.М., Усова В.Н., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Кривогуз Ю.М., Усова В.Н.</copyright-holder><copyright-holder xml:lang="en">Krivoguz Y.M., Usova V.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://doklady.belnauka.by/jour/article/view/1336">https://doklady.belnauka.by/jour/article/view/1336</self-uri><abstract><p>Исследовано влияние малых добавок алифатического поликетона (АПК) на структурные, механические и реологические характеристики полиамида 6 (ПА6). Установлено, что введение даже минимальных концентраций АПК (0,3–0,5 мас. %) приводит к существенному снижению показателя текучести расплава ПА6, что указывает на интенсивное межмолекулярное взаимодействие компонентов. Показано, что эффект малых добавок АПК на теплофизические свойства ПА6 носит сложный характер. При 0,3–0,5 мас. % АПК стимулирует кристаллизацию полиамидной матрицы, повышая энтальпию фазовых переходов и индекс кристалличности. Дальнейшее увеличение концентрации АПК до 1,0–5,0 мас. % подавляет кристаллизацию ПА6, приводя к снижению всех исследуемых теплофизических характеристик. Проведенное исследование выявило экстремальный характер влияния малых добавок АПК на прочностные свойства ПА6. Оптимальная концентрация АПК для повышения механической прочности ПА6 составляет 1,0 мас. %, при которой достигаются максимальные значения модуля упругости, предела текучести и прочности при растяжении.</p></abstract><trans-abstract xml:lang="en"><p>The influence of small additive of aliphatic polyketone (APK) on the structural, mechanical, and rheological characteristics of polyamide 6 (PA6) has been investigated. It was established that the introduction of even minimal APK concentrations (0.3–0.5 wt. %) leads to a significant reduction in the melt flow index of PA6, indicating intensive intermolecular interaction between the components. The impact of small APK additives on the thermophysical properties of PA6 exhibits complex behavior. Within the 0.3–0.5 wt. % range, APK stimulates the crystallization of the polyamide matrix, increasing the phase transition enthalpies and the crystallinity index. Conversely, further increasing the APK content to 1.0– 5.0 wt. % suppresses PA6 crystallization, resulting in a decrease in all studied thermophysical parameters. The study revealed an extremal nature of the effect of small APK additions on the strength properties of PA6. The optimal APK concentration for enhancing the mechanical strength of PA6 is 1.0 wt. %, at which maximum values for the elastic modulus, yield point, and tensile strength are achieved.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>полиамид</kwd><kwd>алифатический поликетон</kwd><kwd>малые добавки</kwd><kwd>структура</kwd><kwd>свойства</kwd></kwd-group><kwd-group xml:lang="en"><kwd>polyamide</kwd><kwd>aliphatic polyketone</kwd><kwd>small additives</kwd><kwd>structure</kwd><kwd>properties</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках задания 4.2.4 «Разработка и совершенствование научных основ модифицирования полиолефинов и гетероцепных полимеров методом реакционной экструзии для создания полимерных композитов с улучшенным комплексом технических свойств» ГПНИ 7 «Современное материаловедение, перспективные материалы и новые технологии», подпрограмма 7.4 «Порошковые и композиционные материалы» на 2026–2030 гг.</funding-statement><funding-statement xml:lang="en">The work was carried out within the framework of task 4.2.4 “Development and improvement of the scientific foundations for modifying polyolefins and heterochain polymers by reactive extrusion to create polymer composites with an improved set of technical properties” of the State Program for Scientific Research 7 “Modern Materials Science, Advanced Materials and New Technologies”, subprogram 7.4 “Powder and Composite Materials” for 2026–2030.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Utracki, L. 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