<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>336</id>
    <completedYear>2014</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>71</pageFirst>
    <pageLast>75</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>18</volume>
    <type>articlewildau</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>2014-10-16</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">New aromatic polyesterpolyols derived from PET industrial wastes</title>
    <abstract language="deu">China hat den globalen Recycling-Markt letztes Jahr mit der Ankündigung geschockt, nicht länger niederwertige Qualitäten von rezyklierbaren Abfällen von ausländischen Exporteuren zu akzeptieren – die so genannte „Aktion Grüner Zaun“ startete zu Beginn des Jahres 2013. Die Antwort im Westen sollte ein Innovations- und Investitionsschub in Recycling-Technologie zur Entwicklung eines erfolgreichen Recycling-Marktes sein. Dies sollte hochentwickelte Behandlungstechnologien und installierte Anlagentechnik umfassen. Für PET-Getränkeflaschen aus den Pfandsystemen haben wir einen Prozess des rohstofflichen Recyclings entwickelt, mit dem Ausgangsstoffe für verschiedene technische Anwendungen gewonnen werden können. Die gewonnenen Aromatischen Polyesterpolyole (APP) dienen hierbei als Ausgangsstoffe zur Herstellung von Polyurethanen.</abstract>
    <abstract language="eng">China sent shock waves through the global recycling market last year when it announced it would no longer be accepting poor qualities of recyclable waste from foreign exporters – the so-called green fence action started in the beginning of year 2013. The answer should be a wave of innovation and investment in recycling technology tocatalyze successful recycling markets in the west. This could include more sophisticated handling and treatment techniques and more high-technology processing plants. In the case of PET from returnable bottles we developed a process of chemical recycling to produce feedstocks for several technical applications. Aromatic polyester polyols (APP) are a major class of raw materials to produce polyurethanes.</abstract>
    <parentTitle language="deu">Wissenschaftliche Beiträge 2014</parentTitle>
    <identifier type="urn">urn:nbn:de:kobv:526-opus4-3363</identifier>
    <identifier type="doi">10.15771/0949-8214_2014_1_9</identifier>
    <identifier type="issn">0949-8214</identifier>
    <enrichment key="ZSTiteliD">16238</enrichment>
    <licence>Creative Commons - CC BY-NC-ND 3.0 DE - Namensnennung - Nicht-kommerziell - Keine Bearbeitung 3.0 Deutschland</licence>
    <author>Eckhart Kornejew</author>
    <author>Kiril Dimitrov</author>
    <author>Michael Herzog</author>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="Publikationen_der_TH_Wildau" number="">Wissenschaftliche Beiträge</collection>
    <collection role="institutes" number="">Fachbereich Ingenieur- und Naturwissenschaften</collection>
    <collection role="open_access" number="">open_access</collection>
    <collection role="green_open_access" number="3">Diamond Open Access</collection>
    <thesisPublisher>Technische Hochschule Wildau</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-th-wildau/files/336/09_New_Aromatic_Polyesterpolyols.pdf</file>
  </doc>
  <doc>
    <id>1491</id>
    <completedYear>2021</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>12</volume>
    <type>article</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Determination of thermo-mechanical properties of recycled polyurethane from glycolysis polyol</title>
    <abstract language="eng">Polyurethane foam is one of the most versatile polymers widely used in the automotive industry. However, due to the rising amount of polyurethane foam waste in the environment, there is growing research attention focusing on circular economy solutions to closing the material loop. This study aimed to determine the possible changes in thermo-mechanical properties between rigid polyurethane prepared using polyols derived from depolymerization of commercial polyurethane foam with benchmark rigid polyurethane (Ben PU). Polyurethane foams containing dispersion polyol were reacted with dipropylene glycol (DPG) and diethylene glycol (DEG) with a ratio of DPG: DEG of 1:1 in the presence of a consumable catalyst (Di-n-butyl amine). The recovered polyol was used as a raw material replacing 100% benchmark rigid polyurethane petroleum-based polyester polyol to produce the recycled polyurethane (Rec PU). Thermal analysis was conducted to measure the recycled polyurethane's glass transition temperatures (Tg) using differential scanning calorimetry (DSC). Tensile strength, elastic modulus, toughness, and hardness test of the recycled polyurethane were conducted under three different temperatures; 24°C, 40°C, and 60°C. From the DSC results, the glass transition temperatures for the recycled and the benchmark rigid polyurethane occurred at 43°C and 50.4°C, respectively. Both polymers showed the brittle-ductile transition from 24°C to 40°C. Tensile strength for recycled polyurethane was lower than that of benchmark rigid polyurethane by 29-43% and a corresponding 24-50% decrease in elastic modulus. Recycled polyurethane recorded lower toughness than petroleum-based pure polyurethane by 13-16%. However, the recycled polymer recorded high shored D values than the benchmark rigid polyurethane by 9-29%. This study reveals that recycled polyol could be used as feedstock for polyurethane production with applications tailored to its mechanical properties.</abstract>
    <parentTitle language="eng">Scientific African</parentTitle>
    <identifier type="issn">2468-2276</identifier>
    <identifier type="urn">urn:nbn:de:kobv:526-opus4-14911</identifier>
    <enrichment key="opus.import.date">2021-09-09T12:50:48+00:00</enrichment>
    <enrichment key="opus.source">sword</enrichment>
    <enrichment key="opus.import.user">sword</enrichment>
    <enrichment key="opus.import.file">filename=phpsTnplO</enrichment>
    <enrichment key="opus.import.checksum">0bed7a098ae3da6d14322aa9cc43a3a5</enrichment>
    <enrichment key="DOI_VoR">https://doi.org/10.1016/j.sciaf.2021.e00755</enrichment>
    <enrichment key="SourceTitle">Njuguna, J. K., Muchiri, P., Karuri, N. W., Herzog, M., Dimitrov, K., &amp; Mwema, F. M. (2021). Determination of thermo-mechanical properties of recycled polyurethane from glycolysis polyol. Scientific African, 12, e00755. doi:10.1016/j.sciaf.2021.e00755</enrichment>
    <licence>Creative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International</licence>
    <author>James K. Njuguna</author>
    <author>Peter Muchiri</author>
    <author>Fredrick M. Mwema</author>
    <author>Nancy W. Karuri</author>
    <author>Michael Herzog</author>
    <author>Kiril Dimitrov</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>polyurethane foam</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>recycling</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>glycolysis</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>rigid polyurethane</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>thermo-mechanical property</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>circular economy</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">Fachbereich Ingenieur- und Naturwissenschaften</collection>
    <collection role="open_access" number="">open_access</collection>
    <collection role="Import" number="import">Import</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/1491/1-s2.0-S2468227621000594-main.pdf</file>
  </doc>
</export-example>
