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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">plasticnews</journal-id><journal-title-group><journal-title xml:lang="ru">Пластические массы</journal-title><trans-title-group xml:lang="en"><trans-title>Plasticheskie massy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0554-2901</issn><publisher><publisher-name>PLASTMASSY Publishing House (Moscow)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.35164/0554-2901-2021-3-4-46-49</article-id><article-id custom-type="elpub" pub-id-type="custom">plasticnews-627</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>ПЕРЕРАБОТКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>RECYCLING</subject></subj-group></article-categories><title-group><article-title>Влияние условий переработки полипропилена на его термические и физико-механические характеристики</article-title><trans-title-group xml:lang="en"><trans-title>Influence of polypropylene processing conditions on its thermal, physical and mechanical characteristics</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>Садритдинов</surname><given-names>А. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Sadritdinov</surname><given-names>A. R.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Глазырин</surname><given-names>А. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Glazyrin</surname><given-names>A. B.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Псянчин</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Psyanchin</surname><given-names>A. A.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Захарова</surname><given-names>Е. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Zakharova</surname><given-names>E. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Республика Башкортостан, Уфа</p></bio><bio xml:lang="en"><p>Republic of Bashkortostan, Ufa</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>Хуснуллин</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Khusnullin</surname><given-names>A. G.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Захаров</surname><given-names>В. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Zakharov</surname><given-names>V. P.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Башкирский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Bashkir State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Башкирский государственный университет; Уфимский институт химии УФИЦ РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Bashkir State University; Ufa Institute of Chemistry UFIC RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>17</day><month>05</month><year>2021</year></pub-date><volume>0</volume><issue>3-4</issue><fpage>46</fpage><lpage>49</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Садритдинов А.Р., Глазырин А.Б., Псянчин А.А., Захарова Е.М., Хуснуллин А.Г., Захаров В.П., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Садритдинов А.Р., Глазырин А.Б., Псянчин А.А., Захарова Е.М., Хуснуллин А.Г., Захаров В.П.</copyright-holder><copyright-holder xml:lang="en">Sadritdinov A.R., Glazyrin A.B., Psyanchin A.A., Zakharova E.M., Khusnullin A.G., Zakharov V.P.</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.plastics-news.ru/jour/article/view/627">https://www.plastics-news.ru/jour/article/view/627</self-uri><abstract><p>В работе изучено влияние способа и числа циклов переработки полипропилена на его термические и физико-меха- нические свойства. Показано, что, независимо от способа переработки, термостабильность полипропилена, выраженная температурой начала разложения, снижается, повышается содержание термически стойких соединений, снижается сте- пень кристалличности полимера на 5,66,5%. С увеличением числа циклов «нагрев-охлаждение», моделирующих крат- ность переработки термопластичного полипропилена, происходит снижение температуры начала разложения с 211°C до 166°C, уменьшение массы образца в результате его частичного разложения, снижается температура плавления с 166°C до 158°C, уменьшается степень кристалличности полимера. С увеличением числа циклов переработки полипропилена методом компаундирования в смесительной камере пластографа наблюдается рост нагрузки на вращение шнеков в процессе пластикации и текучести расплава, при этом для пластмассового образца последовательно снижается прочность и удлинение при разрыве.</p></abstract><trans-abstract xml:lang="en"><p>The eﬀect of the method and the number of processing cycles on polypropylene thermal and physical-mechanical properties is studied. It is shown that, regardless of the processing method, the thermal stability of polypropylene, expressed by the temperature of the onset of decomposition, decreases, the content of thermally stable compounds increases, and the degree of crystallinity of the polymer decreases by 5.6–6.5%. With an increase in the number of heating-cooling cycles simulating the multiplicity of thermoplastic polypropylene processing, the temperature of the onset of decomposition decreases from 211°C to 166°C, the mass of the sample decreases due to its partial decomposition, the melting point decreases from 166°C to 158°C, the degree of crystallinity of the polymer decreases. With an increase in the number of polypropylene processing cycles by compounding in the mixing chamber of the plastograph, an increase in the load on the rotation of the screws during plasticization and in the melt flow is observed, while the strength and elongation at break of the plastic sample consistently decrease..</p></trans-abstract><kwd-group xml:lang="ru"><kwd>полипропилен</kwd><kwd>физико-механические свойства</kwd><kwd>термостабильность</kwd><kwd>термогравиметрический анализ</kwd><kwd>дифференциальная сканирующая калориметрия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>polypropylene</kwd><kwd>physical and mechanical properties</kwd><kwd>thermal stability</kwd><kwd>thermogravimetric analysis</kwd><kwd>diﬀerential scanning calorimetry</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта № 19-33-90087.</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">Asad N., Tariq Y., Atif I. 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