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  <doc>
    <id>1913</id>
    <completedYear>2023</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>1</pageNumber>
    <edition/>
    <issue>14</issue>
    <volume>15</volume>
    <type>article</type>
    <publisherName>MDPI</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">UV LED Curable Perfluoropolyether (PFPE)-Urethane Methacrylate Transparent Coatings for Photonic Applications: Synthesis and Characterization</title>
    <abstract language="eng">The contribution aims to bring forth a novel synthesis route in developing transparent UV LED-curable coatings accounting for various exposure options. A selection of perfluoropolyether (PFPE)-urethane methacrylate and acrylate resins, free-radical photo-initiator Omnirad 2100, and two distinct silane-based crosslinking agents were blended under a weight ratio of 75:20:5 (without crosslinker) and 70:15:5:10, respectively. The coatings were cured under a UV LED 4 × 3 matrix light emitting source, in a chamber under a controlled atmosphere, by means of an in-house developed conveyor belt type platform, at different conveyor belt speeds (5, 50, 150, 250, and 500 mm/s). The morphologies of fabricated coatings were characterized by FTIR revealing high conversion rates (e.g., from 98 to 100%) for increased exposure time as a result of the 5 or 50 mm/s values, on all combinations. Dynamic–mechanical and optical properties of UV LED-cured transparent coatings were also investigated. A negative shift of the glass transition temperature values with a decrease in exposure time, in all combinations, from about 60 °C to 30 °C, along with storage moduli lowering in the glassy plateau further favors higher exposure times for curing. The refractive indices of poly-mers were from 1.38 to 1.40, whereas the thermo-optic coefficients are showing minor changes around the value of 2.55∙10−4 K−1.</abstract>
    <parentTitle language="eng">Polymers</parentTitle>
    <identifier type="urn">urn:nbn:de:kobv:526-opus4-19139</identifier>
    <enrichment key="opus.import.data">@articleDreyer2023, address = "Basel", publisher = "MDPI", eissn = "2073-4360", abstract = "The contribution aims to bring forth a novel synthesis route in developing transparent UV LED-curable coatings accounting for various exposure options. A selection of perfluoropolyether (PFPE)-urethane methacrylate and acrylate resins, free-radical photo-initiator Omnirad 2100, and two distinct silane-based crosslinking agents were blended under a weight ratio of 75:20:5 (without crosslinker) and 70:15:5:10, respectively. The coatings were cured under a UV LED 4 × 3 matrix light emitting source, in a chamber under a controlled atmosphere, by means of an in-house developed conveyor belt type platform, at different conveyor belt speeds (5, 50, 150, 250, and 500 mm/s). The morphologies of fabricated coatings were characterized by FTIR revealing high conversion rates (e.g., from 98 to 100 author = "Dreyer, Christian and Motoc, Dana Luca and Koehler, Mathias and Goldenberg, Leonid", doi = "10.3390/polym15142983", journal = "Polymers", keywords = "UV LED curable coating, dielectric properties, fluoroacrylates, optical loss, perfluoropolyether (PFPE), refractive index, thermo-optic coefficient, viscoelastic properties", language = "eng", number = "14", pages = "2983–2983", title = "UV LED Curable Perfluoropolyether (PFPE)-Urethane Methacrylate Transparent Coatings for Photonic Applications: Synthesis and Characterization", volume = "15", year = "2023"</enrichment>
    <enrichment key="opus.import.dataHash">md5:5f78e1eb6e2efb3895ddaaec3618e73b</enrichment>
    <enrichment key="opus.import.date">2024-04-18T07:28:27+00:00</enrichment>
    <enrichment key="opus.import.file">/tmp/phpctIA67</enrichment>
    <enrichment key="opus.import.format">bibtex</enrichment>
    <enrichment key="opus.import.id">6620cb9b1fac10.51031655</enrichment>
    <enrichment key="DOI_VoR">https://doi.org/10.3390/polym15142983</enrichment>
    <enrichment key="SourceTitle">Dreyer, C.; Motoc, D.L.; Koehler, M.; Goldenberg, L. UV LED Curable Perfluoropolyether (PFPE)-Urethane Methacrylate Transparent Coatings for Photonic Applications: Synthesis and Characterization. Polymers 2023, 15, 2983. https://doi.org/10.3390/polym15142983</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Christian Dreyer</author>
    <author>Dana Luca Motoc</author>
    <author>Mathias Koehler</author>
    <author>Leonid Goldenberg</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>perfluoropolyether (PFPE)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>fluoroacrylate</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>UV LED curable coating</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>viscoelastic property</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>refractive index</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>thermo-optic coefficient</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>optical loss</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>dielectric property</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="ddc" number="668">Technik anderer organischer Produkte</collection>
    <collection role="institutes" number="">Fachbereich Ingenieur- und Naturwissenschaften</collection>
    <collection role="open_access" number="">open_access</collection>
    <collection role="green_open_access" number="1">Gold Open Access</collection>
    <thesisPublisher>Technische Hochschule Wildau</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-th-wildau/files/1913/polymers-15-02983.pdf</file>
  </doc>
</export-example>
