1 Ocak 2021 Dergi makalesi Açık Erişim

Candau, Nicolas; Stoclet, Gregory; Tahon, Jean-Francois; Demongeot, Adrien; Yilgor, Emel; Yilgor, Iskender; Menceloglu, Yusuf Z.; Oguz, Oguzhan

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/231498</identifier>
  <creators>
    <creator>
      <creatorName>Candau, Nicolas</creatorName>
      <givenName>Nicolas</givenName>
      <familyName>Candau</familyName>
      <affiliation>Univ Politecn Catalunya Barcelona Tech EEBE UPC, Ctr Catala Plast CCP, Av Eduard Maristany 16, Barcelona 08019, Spain</affiliation>
    </creator>
    <creator>
      <creatorName>Stoclet, Gregory</creatorName>
      <givenName>Gregory</givenName>
      <familyName>Stoclet</familyName>
      <affiliation>Univ Lille Nord France, Unite Mat &amp; Transformat UMET, UMR CNRS 8207, USTL ENSCL, Bat C7,BP 90108, F-59652 Villeneuve Dascq, France</affiliation>
    </creator>
    <creator>
      <creatorName>Tahon, Jean-Francois</creatorName>
      <givenName>Jean-Francois</givenName>
      <familyName>Tahon</familyName>
      <affiliation>Univ Lille Nord France, Unite Mat &amp; Transformat UMET, UMR CNRS 8207, USTL ENSCL, Bat C7,BP 90108, F-59652 Villeneuve Dascq, France</affiliation>
    </creator>
    <creator>
      <creatorName>Demongeot, Adrien</creatorName>
      <givenName>Adrien</givenName>
      <familyName>Demongeot</familyName>
      <affiliation>Ecole Polytech Fed Lausanne EPFL, Lab Proc Adv Composites LPAC, Inst Mat IMX, Stn 12, CH-1015 Lausanne, Switzerland</affiliation>
    </creator>
    <creator>
      <creatorName>Yilgor, Emel</creatorName>
      <givenName>Emel</givenName>
      <familyName>Yilgor</familyName>
      <affiliation>Koc Univ, KUYTAM Surface Sci &amp; Technol Ctr, Chem Dept, TR-34450 Istanbul, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Yilgor, Iskender</creatorName>
      <givenName>Iskender</givenName>
      <familyName>Yilgor</familyName>
      <affiliation>Koc Univ, KUYTAM Surface Sci &amp; Technol Ctr, Chem Dept, TR-34450 Istanbul, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Menceloglu, Yusuf Z.</creatorName>
      <givenName>Yusuf Z.</givenName>
      <familyName>Menceloglu</familyName>
    </creator>
    <creator>
      <creatorName>Oguz, Oguzhan</creatorName>
      <givenName>Oguzhan</givenName>
      <familyName>Oguz</familyName>
    </creator>
  </creators>
  <titles>
    <title>Mechanical Reinforcement And Memory Effect Of Strain-Induced Soft Segment Crystals In Thermoplastic Polyurethane-Urea Elastomers</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2021</publicationYear>
  <dates>
    <date dateType="Issued">2021-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/231498</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1016/j.polymer.2021.123708</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">An amorphous poly(urethane-urea) copolymer composed of 70 wt% poly(ethylene oxide) (PEO) soft segments (SS) (Mw = 2000 g mol-1) and 30 wt% cycloaliphatic hard segments (HS) was subjected to in-situ X-Rays during tensile deformation. Mechanical hardening at room temperature was attributed to strain induced crystallization (SIC) of the PEO SS through the multiplication of aligned crystallites. The permanent nature of these crystals after stress removal indicates a certain mechanical stability, which we related here to the concomitant effect of superstraining of the SS crystallites and the HS reorganization upon deformation. This is in marked contrast to previous studies which reported the crystalline phase to be temporary upon unloading. A manifestation of such enhanced stability is the memory effect evidenced by an increased crystallizability of PEO segments during incremental cyclic loading. These results offer a way to (i) tune the mechanical properties of TPUs via the formation of mechanically stable pre-oriented SS crystals and to (ii) tune the thermally/water activated shape memory properties of TPUs (shape fixity, kinetics of shape memory recovery).</description>
  </descriptions>
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