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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">najo-1381</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="en"><subject>PAPERS, PRESENTED AT MAM-12</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>PAPERS, PRESENTED AT MAM-12</subject></subj-group></article-categories><title-group><article-title>Miscibility studies of PVC/PMMA blends in Tetrahydrofuran by viscosity, density, refractive index and ultrasonic velocity method</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Sah</surname><given-names>Gautam Kumar</given-names></name></name-alternatives><bio xml:lang="en"><p>University Department of Chemistry (Physical Chemistry section)</p><p>Darbhanga</p></bio><email xlink:type="simple">gautamdar@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Gupta</surname><given-names>Ashok Kumar</given-names></name></name-alternatives><bio xml:lang="en"><p>University Department of Chemistry (Physical Chemistry section)</p><p>Darbhanga</p></bio><email xlink:type="simple">ashokkumargupta80@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Lalit Narayan Mithila University</institution><country>India</country></aff><pub-date pub-type="collection"><year>2013</year></pub-date><pub-date pub-type="epub"><day>22</day><month>08</month><year>2025</year></pub-date><volume>4</volume><issue>2</issue><fpage>288</fpage><lpage>293</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Sah G.K., Gupta A.K., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Sah G.K., Gupta A.K.</copyright-holder><copyright-holder xml:lang="en">Sah G.K., Gupta A.K.</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://nanojournal.ifmo.ru/jour/article/view/1381">https://nanojournal.ifmo.ru/jour/article/view/1381</self-uri><abstract><p>The density and Coefficient of Viscosity for Polyvinyl chloride/poly(methyl methacrylate)(PVC/PMMA)blends in tetrahydrofuran at 303.15 K and 313.15 K were measured. These measured parameters were then used to estimate few other related physical quantities like Huggin’s constants and the interaction parameters μ and α proposed by Chee and Sun et al. to identify the molecular interaction arising in the mentioned polymer blend solutions. The peculiar deviation confirms the structural changes in the solution of blends.</p></abstract><kwd-group xml:lang="en"><kwd>viscosity</kwd><kwd>polymer blends</kwd><kwd>poly(methyl methacrylate)</kwd><kwd>poly (vinyl chloride)</kwd><kwd>molecular interac tion</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">Stephen A.M., Kumar T.P., Renganathan N.G., Pitchumani S., Thirunakaran R., Muniyandi N. Ionic conductivity and FT-IR studies on plasticized PVC/PMMA blend polymer electrolytes. 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