1 Ocak 2020 Dergi makalesi Açık Erişim

Sari, Ahmet; Bicer, Alper; Alkan, Cemil

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/7877</identifier>
  <creators>
    <creator>
      <creatorName>Sari, Ahmet</creatorName>
      <givenName>Ahmet</givenName>
      <familyName>Sari</familyName>
      <affiliation>Karadeniz Tech Univ, Dept Met &amp; Mat Engn, TR-61080 Trabzon, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Bicer, Alper</creatorName>
      <givenName>Alper</givenName>
      <familyName>Bicer</familyName>
      <affiliation>Tokat Gaziosmanpasa Univ, Dept Chem, Tokat, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Alkan, Cemil</creatorName>
      <givenName>Cemil</givenName>
      <familyName>Alkan</familyName>
      <affiliation>Tokat Gaziosmanpasa Univ, Dept Chem, Tokat, Turkey</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Thermal Energy Storage Properties Of Polyethylene Glycol Grafted Styrenic Copolymer As Novel Solid-Solid Phase Change Materials</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2020</publicationYear>
  <dates>
    <date dateType="Issued">2020-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/7877</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1002/er.5208</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">Polymeric solid-solid phase change materials (S-SPCMs) are functional materials with phase transition-heat storing/releasing ability. With this respect, a series of polyethylene glycol (PEG) grafted styrenic copolymer were produced as novel S-SPCMs. PEGs with three different molecular weights were used for synthesis of isocyanate-terminated polymers (ITPs). To achieve cross-linking S-SPCMs, the ITPs were grafted with styrene-co-ally alcohol) (PSAA) at three different PSAA:PEG mole ratios. The produced polymers were characterized using Fourier transform infrared (FT-IR), proton nuclear magnetic resonance (H-1 NMR), and X-ray diffraction (XRD) technique. The crystalline-amorphous phase transitions of the polymers were examined using polarized optical microscopy (POM). The FT-IR, NMR, and XRD results confirmed the expected chemical structures and crystallization performances of the polymers. Thermal energy storage (TES) properties of the S-SPCMs were determined by differential scanning calorimetry (DSC). The DSC results revealed that the polymers with grafting ratio of PSAA:PEG(1:1) had phase transition enthalpies between about 74 and 142 J/g and phase transition temperatures between about 26 degrees C and 57 degrees C. Thermogravimetric analysis (TGA) measurements demonstrated that the S-SPCMs were resistant to thermal decomposition until about 300 degrees C. Thermal conductivities of the produced S-SPCMs were measured in a range of about 0.18 to 0.19 W/mK. Furthermore, TES properties of the S-SPCMs were slightly changed as their chemical structures were remained after 5000 thermal cycles. By overall evaluation of the findings, it can be foreseen that particularly PSAA-g-PEG(1:1) polymers can be considered as promising S-SPCMs for some TES practices such as air conditioning of buildings, thermoregulation of food packages, automobile components, electronic devices, and solar photovoltaic panels.</description>
  </descriptions>
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