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<export-example>
  <doc>
    <id>40417</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>3140</pageFirst>
    <pageLast>3153</pageLast>
    <pageNumber/>
    <edition/>
    <issue>20</issue>
    <volume>8</volume>
    <type>article</type>
    <publisherName>RSC</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Thermoresponsive functional polymers based on 2,6-diaminopyridine motif with tunable UCST behaviour in water/alcohol mixtures</title>
    <abstract language="eng">2,6-Diaminopyridine based functional polymers poly N-(6-aminopyridin-2-yl)acrylamide) (PNAPAAm) and poly(N-(6-acetamidopyridin-2-yl)acrylamide) (PNAcAPAAm) were synthesized via free radical polymerization and in addition PNAcAPAAm was synthesized by reversible addition–fragmentation chain transfer (RAFT) polymerization for comparison. The obtained polymers displayed upper critical solution temperature (UCST)-type reversible thermoresponsiveness in water/alcohol mixtures. The UCST Phase transition behaviour of the obtained functional polymers was studied using temperature dependent turbidimetry, dynamic light scattering and 1H-NMR measurements. The phase transition temperature of the polymers was tunable by varying either the concentration of the polymer solution, the nature of the alcohol or the composition of the solvent mixture. The cloud Point temperature of PNAcAPAAm was found to decrease with increasing alcohol content (MeOH, EtOH and iPrOH) in water/alcohol mixtures.&#13;
Past a critical amount of EtOH or iPrOH in water, the cloud point temperature of PNAcAPAAm increased upon further addition of EtOH or iPrOH. Such functional polymers with tunable UCST behaviour can be applicable in drug delivery, sensing, personal care and microfluidic applications.</abstract>
    <parentTitle language="eng">Polymer Chemistry</parentTitle>
    <identifier type="doi">10.1039/c7py00539c</identifier>
    <identifier type="issn">1759-9954</identifier>
    <identifier type="issn">1759-9962</identifier>
    <enrichment key="date_peer_review">15.06.2017</enrichment>
    <author>Asad Asadujjaman</author>
    <author>Vahid Ahmadi</author>
    <author>M. Yalcin</author>
    <author>N. ten Brummelhuis</author>
    <author>Annabelle Bertin</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>UCST polymer</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>2,6-diaminopyridine</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Cosolvency</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>49297</id>
    <completedYear/>
    <publishedYear>2019</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>2064</pageFirst>
    <pageLast>2073</pageLast>
    <pageNumber/>
    <edition/>
    <issue>19</issue>
    <volume>57</volume>
    <type>article</type>
    <publisherName>Wiley</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">2,6-Diaminopyridine and Acrylamide-Based Copolymers with Upper Critical Solution Temperature-type Behavior in Aqueous Solution</title>
    <abstract language="eng">A novel cop olyme r based on supramolecular motif2,6-diaminopyridin e and water-soluble acrylamide, poly[N-(6-ace tamidopyridin-2-yl) acrylamide-co-acrylamide], was synthe-size d via rev ersible addi tion–fragmentation chain transfer (RAFT)polymerization with various monomer compositions. The thermo-respon sive behavior of the copolymers was studied by turbidime-try and dynamic light scattering (DLS). The obtained copolymersshowed an upper critical solution temperature (UCST)-typ e phasetransition behavior in water and electrolyte solution. The phasetransition temperature was found to increase with decreasingam ount of acrylamide in the copolymer and increasing concentra-tion of the solution. Furth ermore, the phase transition temperatureva ried in aqueous solutions of electrolytes according to the naturean d concentration of the electrolyte in accordance with theHoffmeister series. A dramatic solvent isotope effect on thetransition temperature was o bserved in this study, as the transitiontemperature was almost 10–12C higher in D2OthaninH2Oatthesame concentration and acrylamide co mposition. The size of theaggregates below the transition temperature was larger in D2Ocompared to that in H2O that can be explained by deuterium iso-tope effect. The thermoresponsive behavior of the copolymers wasalso investigated in different cell medium and found to be exhibitedUCST-type phase transition behavior in different cell medium.Such behavior of the copo lyme rs can be useful in many a pplica-tions including biomedical, microﬂuidics, optical materials, and indrug delivery.</abstract>
    <parentTitle language="eng">Journal of polymer science part a-polymer chemistry</parentTitle>
    <identifier type="doi">10.1002/pola.29474</identifier>
    <identifier type="issn">0887-624X</identifier>
    <enrichment key="date_peer_review">16.10.2019</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <author>Asad Asadujjaman</author>
    <author>Vahid Ahmadi</author>
    <author>Antoine Michel Claude Franc</author>
    <author>Annabelle Bertin</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>2,6-diaminopyridine</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Acrylamide</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Stimuli-responsive polymers</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Thermo-responsive polymers</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>UCST polymers</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
</export-example>
