1 Ocak 2022 Dergi makalesi Açık Erişim

Su, Esra; Bayazit, Gozde; Ide, Semra; Okay, Oguz

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/261925</identifier>
  <creators>
    <creator>
      <creatorName>Su, Esra</creatorName>
      <givenName>Esra</givenName>
      <familyName>Su</familyName>
      <affiliation>Istanbul Tech Univ, Dept Chem, TR-34469 Istanbul, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Bayazit, Gozde</creatorName>
      <givenName>Gozde</givenName>
      <familyName>Bayazit</familyName>
    </creator>
    <creator>
      <creatorName>Ide, Semra</creatorName>
      <givenName>Semra</givenName>
      <familyName>Ide</familyName>
    </creator>
    <creator>
      <creatorName>Okay, Oguz</creatorName>
      <givenName>Oguz</givenName>
      <familyName>Okay</familyName>
      <affiliation>Istanbul Tech Univ, Dept Chem, TR-34469 Istanbul, Turkey</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Butyl Rubber-Based Interpenetrating Polymer Networks With Side Chain Crystallinity: Self-Healing And Shape-Memory Polymers With Tunable Thermal And Mechanical Properties</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2022</publicationYear>
  <dates>
    <date dateType="Issued">2022-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/261925</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1016/j.eurpolymj.2022.111098</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">A self-healing and shape-memory interpenetrating polymer network (IPN) is produced by UV polymerization of n-octadecyl acrylate (C18A) monomer in a toluene solution of butyl rubber (isobutylene-isoprene rubber, IIR) using Irgacure 2959 photoinitiator at ambient temperature. IPNs containing 20-80 wt% IIR have crystalline domains formed by side-by-side packed octadecyl side chains aligned perpendicular to the poly(C18A) (PC18A) backbone. TEM images reveal that the morphology of IPNs consists of crystalline domains dispersed in a continuous amorphous matrix where the size of the dispersed phase could be adjusted between mu m and nm level by changing the amount of IIR. Calculations indicate that the effective cross-link density of IPNs is mainly determined by their crystalline domains followed by hydrophobic associations while the chemical cross-links between IIR and PC18A components are negligible. We also show that the crystalline domains acting as sacrificial bonds dissipate energy under strain leading to a significant toughness improvement. IPNs exhibit tunable melting temperature (46-50 degrees C), crystallinity (1.5-25%), Young's modulus (0.6-35 MPa), toughness (1.3-12 MPa), and a stretchability of up to 1200% by varying the amount of IIR component. What is more, they also exhibit temperature induced healing behavior with 59-77% efficiency, and an effective shape-memory function. The strategy presented here is applicable for the preparation of IPNs based on various rubbers and poly(n-alkyl (meth)acrylates) with long alkyl side chains.</description>
  </descriptions>
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