1 Ocak 2023 Dergi makalesi Açık Erişim

Coban, Zehra Gul; Kiliclar, Huseyin Cem; Yagci, Yusuf

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/273272</identifier>
  <creators>
    <creator>
      <creatorName>Coban, Zehra Gul</creatorName>
      <givenName>Zehra Gul</givenName>
      <familyName>Coban</familyName>
      <affiliation>Istanbul Tech Univ, Dept Chem, TR-34469 Maslak, Turkiye</affiliation>
    </creator>
    <creator>
      <creatorName>Kiliclar, Huseyin Cem</creatorName>
      <givenName>Huseyin Cem</givenName>
      <familyName>Kiliclar</familyName>
      <affiliation>Istanbul Tech Univ, Dept Chem, TR-34469 Maslak, Turkiye</affiliation>
    </creator>
    <creator>
      <creatorName>Yagci, Yusuf</creatorName>
      <givenName>Yusuf</givenName>
      <familyName>Yagci</familyName>
      <affiliation>Istanbul Tech Univ, Dept Chem, TR-34469 Maslak, Turkiye</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Photoinitiated Cationic Ring-Opening Polymerization Of Octamethylcyclotetrasiloxane</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2023</publicationYear>
  <dates>
    <date dateType="Issued">2023-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/273272</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.3390/molecules28031299</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;Photochemical techniques have recently been revitalized as they can readily be adapted to different polymerization modes to yield a wide range of complex macromolecular structures. However, the implementation of the photoinduced cationic methods in the polymerization of cyclic siloxane monomers has scarcely been investigated. Octamethylcyclotetrasiloxane (D4) is an important monomer for the synthesis of polydimethylsiloxane (PDMS) and its copolymers. In this study, the cationic ring-opening polymerization (ROP) of D4, initiated by diphenyl iodonium hexafluorophosphate (DPI), has been studied. Both direct and indirect initiating systems acting at broad wavelength using benzophenone and pyrene were investigated. In both systems, photochemically generated protonic acids and silylium cations are responsible for the polymerization. The kinetics of the polymerization are followed by viscosimetry and GPC analyses. The reported approach may overcome the problems associated with conventional methods and therefore represents industrial importance for the fabrication of polysiloxanes.&lt;/p&gt;</description>
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