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  <doc>
    <id>51165</id>
    <completedYear/>
    <publishedYear>2020</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>18381</pageFirst>
    <pageLast>18387</pageLast>
    <pageNumber/>
    <edition/>
    <issue>33</issue>
    <volume>22</volume>
    <type>article</type>
    <publisherName>Royal Chemical Society</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Low frequency vibrational density of state of highly permeable super glassy polynorbornenes – The Boson peak</title>
    <abstract language="eng">Inelastic incoherent neutron time-of flight scattering was employed to measure the low frequency density of states for a series of addition polynorbornenes with bulky side groups. The rigid main chain in combination with the bulky side groups give rise to a microporosity of these polymers in the solid state. The microporosity characterized by the BET surfaces area varies systematically in the considered series. Such materials have some possible application as active separation layer in gas separation membranes.&#13;
All investigated materials show excess contributions to the Debye type density of states characteristic for glasses known as Boson peak. The maximum position of the Boson peak shifts to lower frequency values with increasing microporosity. Data for PIM-1 and Matrimid included for comparison are in good agreement to this dependency. This result supports the sound wave interpretation of the Boson peak.</abstract>
    <parentTitle language="eng">Physical Chemistry Chemical Physics</parentTitle>
    <identifier type="doi">10.1039/d0cp03360j</identifier>
    <identifier type="issn">1463-9076</identifier>
    <enrichment key="date_peer_review">09.09.2020</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <author>R. Zorn</author>
    <author>Paulina Szymoniak</author>
    <author>Mohamed Aejaz Kolmangadi</author>
    <author>M. Wolf</author>
    <author>D. Alentiev</author>
    <author>M. Bermeshev</author>
    <author>Martin Böhning</author>
    <author>Andreas Schönhals</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polynorbornes</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Neutron Scattering</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
    <collection role="institutes" number="">6.6 Digitale Materialchemie</collection>
    <collection role="institutes" number="">7 Bauwerkssicherheit</collection>
    <collection role="institutes" number="">7.5 Technische Eigenschaften von Polymerwerkstoffen</collection>
    <collection role="themenfelder" number="">Material</collection>
    <collection role="themenfelder" number="">Chemie und Prozesstechnik</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
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