<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>11357</id>
    <completedYear/>
    <publishedYear>1997</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>2183</pageFirst>
    <pageLast>2192</pageLast>
    <pageNumber/>
    <edition/>
    <issue>11</issue>
    <volume>35</volume>
    <type>article</type>
    <publisherName>Wiley</publisherName>
    <publisherPlace>Hoboken, NJ</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">A new approach of characterizing the hydrolytic degradation of poly(ethylene terephthalate) by MALDI-MS</title>
    <abstract language="eng">The hydrolytic degradation of technical poly(ethylene terephthalate) (PET) was investigated by means of different methods such as size-exclusion chromatography (SEC), viscometry, light-scattering, thin-layer chromatography, end-group titration, and matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). The long-term degradation was simulated by exposing PET filament yarns to aqueous neutral conditions at 90°C for up to 18 weeks. By means of MALDI-MS and thin-layer chromatography, the formation of different oligomers was obtained during polymer degradation. As expected, an ester scission process was found generating acid terminated oligomers (H-[GT]m-OH) and T-[GT]m-OH and ethylene glycol terminated oligomers (H-[GT]m-G), where G is an ethylene glycol unit and T is a terephthalic acid unit. Additionally, the scission of the ester bonds during the chemical treatment led to a strong decrease in the number of cyclic oligomers ([GT]m). The occurrence of di-acid terminated species demonstrated a high degree of degradation.</abstract>
    <parentTitle language="eng">Journal of polymer science A, polymer chemistry</parentTitle>
    <identifier type="old">13008</identifier>
    <identifier type="doi">10.1002/(SICI)1099-0518(199708)35:11&lt;2183::AID-POLA9&gt;3.0.CO;2-Z</identifier>
    <identifier type="issn">0360-6376</identifier>
    <identifier type="issn">0887-624X</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="bibliotheksstandort">ZJ 18A</enrichment>
    <enrichment key="date_peer_review">25.11.2005</enrichment>
    <author>Steffen Weidner</author>
    <author>Gerhard Kühn</author>
    <author>Barbara Werthmann</author>
    <author>Hartmut Schröder</author>
    <author>Ulrich Just</author>
    <author>Renate Borowski</author>
    <author>Renate Decker</author>
    <author>Bärbel Schwarz</author>
    <author>I. Schmücking</author>
    <author>Ingetraut Seifert</author>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
</export-example>
