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Lignins as macromonomers for polyurethane synthesis: a comparative study on hydroxyl groups determination

2008Journal article Restricted access
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dc.contributor.authorCateto, Carolina
dc.contributor.authorBarreiro, M.F.
dc.contributor.authorRodrigues, Alírio
dc.contributor.authorBrochier-Salon, M.C.
dc.contributor.authorThielemans, Wim
dc.contributor.authorBelgacem, Mohamed Naceur
dc.date.accessioned2010-01-22T15:47:50Z
dc.date.available2010-01-22T15:47:50Z
dc.date.issued2008
dc.description.abstractThe hydroxyl group contents of four technical lignins [Indulin AT (Meadwestvaco), Alcell (Repap), Curan 27-11P (Borregaard LignoTech), and Sarkanda (Granit SA)] were investigated in view of their valorization as polyols in polyurethane synthesis. The different hydroxyl group contents were determined by the following methods: titration and 1H-NMR, 13C-NMR, and 31P-NMR spectroscopy. The titration method chosen was on the basis of a standard method commonly used to characterize commercial polyols for polyurethanes synthesis. The values of the total and phenolic hydroxyl contents determined by the different techniques were found to be in good agreement. For the total hydroxyl contents, coefficients of variation of 5.6% (Alcell), 3.2% (Indulin AT), 2.3% (Sarkanda), and 6.2% (Curan 27-11P) were established. For the phenolic hydroxyl contents, a good correlation was observed between data obtained from 31P-NMR and 13C-NMR for all lignin samples, except for the Sarkanda lignin, for which a relatively high coefficient of variation (12.6%) was found. For softwood lignins (Indulin AT and Curan 27-11P), the phenolic hydroxyl content determined by 1H-NMR was always lower than that deduced from 31P-NMR and 13C-NMR spectroscopy.pt
dc.identifier.citationCateto, C.A.; Barreiro, M.F.; Rodrigues, A.E.; Brochier-Salon, M.C.; Thielemans, W.; Belgacem, M.N. (2008). Lignins as macromonomers for polyurethane synthesis: a comparative study on hydroxyl groups determination. Journal of Applied Polymer Science. ISSN 1097-4628. 109:5 (2008) p. 3008-3017pt
dc.identifier.doi10.1002/app.28393
dc.identifier.issn1097-4628
dc.identifier.urihttp://hdl.handle.net/10198/1405
dc.language.isoengpt
dc.language.rfc3066engen
dc.pagination3008-3017en
dc.peerreviewedyesen
dc.publisherWileypt
dc.subjectNMRpt
dc.subjectPolyurethanespt
dc.subjectRenewable resourcespt
dc.titleLignins as macromonomers for polyurethane synthesis: a comparative study on hydroxyl groups determinationpt
dc.typejournal article
dc.volume109en
dspace.entity.typePublication
oaire.citation.endPage3017pt
oaire.citation.startPage3008pt
oaire.citation.titleJournal of Applied Polymer Sciencept
person.familyNameBarreiro
person.givenNameFilomena
person.identifier.ciencia-id3418-47D5-5746
person.identifier.orcid0000-0002-6844-333X
person.identifier.ridL-9802-2014
person.identifier.scopus-author-id57188719717
rcaap.rightsrestrictedAccesspt
rcaap.typearticlept
relation.isAuthorOfPublication0391987c-ba90-488b-839a-153447ce1f0f
relation.isAuthorOfPublication.latestForDiscovery0391987c-ba90-488b-839a-153447ce1f0f

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