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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Herald of Technological University</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Herald of Technological University</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>ВЕСТНИК ТЕХНОЛОГИЧЕСКОГО УНИВЕРСИТЕТА</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">3034-4689</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">62395</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>ХИМИЯ, ТЕХНОЛОГИЯ И ИСПОЛЬЗОВАНИЕ ПОЛИМЕРОВ</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject></subject>
    </subj-group>
    <subj-group>
     <subject>ХИМИЯ, ТЕХНОЛОГИЯ И ИСПОЛЬЗОВАНИЕ ПОЛИМЕРОВ</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">VISCOELASTIC PROPERTIES OF THE POLYSTYRENE IN CONCENTRATED SOLUTIONS AND MELTS (PART 2)</article-title>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Medvedevskikh</surname>
       <given-names>Yu G</given-names>
      </name>
      <name xml:lang="en">
       <surname>Medvedevskikh</surname>
       <given-names>Yu G</given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Khavunko</surname>
       <given-names>O Yu</given-names>
      </name>
      <name xml:lang="en">
       <surname>Khavunko</surname>
       <given-names>O Yu</given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Bazylyak</surname>
       <given-names>L I</given-names>
      </name>
      <name xml:lang="en">
       <surname>Bazylyak</surname>
       <given-names>L I</given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-3"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Zaikov</surname>
       <given-names>G E</given-names>
      </name>
      <name xml:lang="en">
       <surname>Zaikov</surname>
       <given-names>G E</given-names>
      </name>
     </name-alternatives>
     <email>ov_stoyanov@mail.ru</email>
     <xref ref-type="aff" rid="aff-4"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Институт физико-органической химии и углехимии имени Л.М. Литвиненко Национальной академии наук Украины</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">Институт физико-органической химии и углехимии имени Л.М. Литвиненко Национальной академии наук Украины</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Институт физико-органической химии и углехимии имени Л.М. Литвиненко Национальной академии наук Украины</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">Институт физико-органической химии и углехимии имени Л.М. Литвиненко Национальной академии наук Украины</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">Институт физико-органической химии и углехимии имени Л.М. Литвиненко Национальной академии наук Украины</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">Институт физико-органической химии и углехимии имени Л.М. Литвиненко Национальной академии наук Украины</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-4">
    <aff>
     <institution xml:lang="ru">КНИТУ</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">КНИТУ</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2025-08-01T14:05:52+03:00">
    <day>01</day>
    <month>08</month>
    <year>2025</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2025-08-01T14:05:52+03:00">
    <day>01</day>
    <month>08</month>
    <year>2025</year>
   </pub-date>
   <volume>17</volume>
   <issue>2</issue>
   <fpage>144</fpage>
   <lpage>154</lpage>
   <history>
    <date date-type="received" iso-8601-date="2023-04-20T14:49:19+03:00">
     <day>20</day>
     <month>04</month>
     <year>2023</year>
    </date>
   </history>
   <self-uri xlink:href="https://vestniktu.ru/en/nauka/article/62395/view">https://vestniktu.ru/en/nauka/article/62395/view</self-uri>
   <abstract xml:lang="ru">
    <p>Экспериментально исследована зависимость градиента эффективной вязкости η для концентрированных растворов полистирола в толуоле при трех концентрациях ρ = 0,4∙10
                  5; 0,5∙10
                  5; 0,7∙10
                  5 г/м
                  3 соответственно для четырех фракций полистирола со средними молярными массами М = 5,1∙10
                  4; 4,1∙10
                  4; 3,3∙10
                  4; 2,2∙10
                  4 г/моль соответственно. Для каждой пары значений ρ и М зависимость градиента вязкости изучалась при четырех температурах: 25, 30, 35 и 40°С. Эффективная вязкость расплавов полистирола была изучена для тех же фракций, но при температурах 190, 200 и 210°С. Исследования были проведены с использованием ротационного вискозиметра «Rheotest 2,1» при разных угловых скоростях ω вращения рабочего цилиндра. Анализ зависимостей η (ω) позволяет выделить фрикционный η
                  f и упругий компонент η
                  e вязкости и изучить их зависимость от температуры Т, концентрации ρ и длины цепи N. Было установлено, что относительное движение переплетенных между собой полимерных цепей в клубке дает основной вклад в фрикционную составляющую вязкости. Упругий компонент вязкости η
                  е определяется упругими свойствами конформационного объема клубка полимерных цепей при деформации сдвига. На основе экспериментальных данных были получены численные значения характеристического времени и энергии активации сегментального движения. В случае расплава значение Е и ΔS*/R примерно в два раза больше тех же значений для разбавленных и концентрированных растворов полистирола в толуоле; это означает, что динамические свойства полимерных цепей в расплаве значительно ближе значениям этих свойств в полимерной матрице, чем в растворах. Проведенный анализ и обобщение полученных экспериментальных данных показывает, что так же, как и для низкомолекулярных жидкостей, изучение вязкости полимерных растворов позволяет достаточно адекватно оценить характеристическое время сегментальной подвижности, соответственно которому коэффициенты диффузии полимерных цепей могут быть рассчитаны в растворах и расплаве, другими словами, чтобы определить их динамические характеристики. </p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>A gradient dependence of the effective viscosity η for the concentrated solutions of the polystyrene in toluene at three concentrations ρ = 0,4∙10
                  5; 0,5∙10
                  5; 0,7∙10
                  5 g/m 
                  3 correspondingly for the fourth fractions of the polystyrene with the average molar weights М = 5,1∙10
                  4; 4,1∙10
                  4; 3,3∙10
                  4; 2,2∙10
                  4 g/mole respectively has been experimentally investigated . For every pair of the values ρ and М a gradient dependence of the viscosity was studied at four temperatures: 25, 30, 35 and 40° С . An effective viscosity of the melts of polystyrene was studied for the same fractions, but at the temperatures 190, 200 and 210° С . The investigations have been carried out with the use of the rotary viscosimeter «Rheotest 2.1 » under the different angular velocities ω of the working cylinder rotation . An analysis of the dependencies η(ω) permitted to mark the frictional η
                  f and elastic η
                  e components of the viscosity ant to study their dependence on temperature Т, concentration ρ and on the length of a chain N. It was determined, that the relative movement of the intertwined between themselves polymeric chains into m-ball, which includes into itself the all possible effects of the gearings, makes the main endowment into the frictional component of the viscosity. The elastic component of the viscosity η
                  е is determined by the elastic properties of the conformational volume of the m-ball of polymeric chains under its shear strain. The numerical values of the characteristic time and the activation energy of the segmental movement were obtained on the basis of the experimental data. In a case of a melt the value of E and ΔS*/R are approximately in two times more than the same values for the diluted and concentrated solutions of the polystyrene in toluene; this means that the dynamic properties of the polymeric chains in melt are considerably near to their values in polymeric matrix than in solutions. Carried out analysis and generalization of the obtained experimental data show that as same as for low-molecular liquids the studying of the viscosity of polymeric solutions permits sufficient adequate to estimate the characteristic time of the segmental movement accordingly to which the coefficients of polymeric chains diffusion can be calculated in solutions and melt, in other words, to determine their dynamic characteristics. </p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>effective viscosity</kwd>
    <kwd>frictional and elastic components of the viscosity</kwd>
    <kwd>m-ball</kwd>
    <kwd>segmental motion</kwd>
    <kwd>activation energy</kwd>
    <kwd>эффективная вязкость</kwd>
    <kwd>фрикционный и упругий компоненты вязкости</kwd>
    <kwd>клубок</kwd>
    <kwd>сегментальная подвижность</kwd>
    <kwd>энергия активации</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>effective viscosity</kwd>
    <kwd>frictional and elastic components of the viscosity</kwd>
    <kwd>m-ball</kwd>
    <kwd>segmental motion</kwd>
    <kwd>activation energy</kwd>
    <kwd>эффективная вязкость</kwd>
    <kwd>фрикционный и упругий компоненты вязкости</kwd>
    <kwd>клубок</kwd>
    <kwd>сегментальная подвижность</kwd>
    <kwd>энергия активации</kwd>
   </kwd-group>
  </article-meta>
 </front>
 <body>
  <p></p>
 </body>
 <back>
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