Publicação:
Thermal and photochemical stability of poly(vinyl alcohol)/modified lignin blends

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dc.contributor.authorFernandes, D. M.
dc.contributor.authorHechenleitner, AAW
dc.contributor.authorJob, A. E.
dc.contributor.authorRadovanocic, E.
dc.contributor.authorPineda, EAG
dc.contributor.institutionUniversidade Estadual de Maringá (UEM)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:30:14Z
dc.date.available2014-05-20T15:30:14Z
dc.date.issued2006-05-01
dc.description.abstractA kraft lignin derivative (KLD) obtained by reaction with p-aminobenzoic acid/phthalic anhydride was blended with poly(vinyl alcohol) (PVA) by solution casting from DMSO. PVA and PVA/KLD films were exposed to ultraviolet radiation (24, 48, and 96 h) and analyzed by thermogravimetry (TG), differential scanning calorimetry (DSC), infrared spectroscopy (FTIR), hydrogen nuclear magnetic resonance (H-1 NMR) spectroscopy, and scanning electron microscopy (SEM). PVA films show a loss of thermal stability due to irradiation. PVA/KLD reveals greater thermal stability than PVA and an increase in thermal stability after irradiation. These results suggest that the incorporation of KLD into PVA provides a gain in thermal and photochemical stability. FTIR, H-1 NMR, DSC, and TG results obtained for the blends suggest that intermolecular interactions between PVA and KLD chains are present. SEM micrographs revealed blend miscibility for a KLD blend content of up to 15 wt%, as observed at magnification of 1000 times. (c) 2005 Elsevier Ltd. All rights reserved.en
dc.description.affiliationUniv Estadual Maringa, Dept Quim, BR-87020900 Maringa, Parana, Brazil
dc.description.affiliationUNESP, Fac Ciências & Tecnol, BR-19060080 Presidente Prudente, SP, Brazil
dc.description.affiliationUnespUNESP, Fac Ciências & Tecnol, BR-19060080 Presidente Prudente, SP, Brazil
dc.format.extent1192-1201
dc.identifierhttp://dx.doi.org/10.1016/j.polymdegradstab.2005.05.024
dc.identifier.citationPolymer Degradation and Stability. Oxford: Elsevier B.V., v. 91, n. 5, p. 1192-1201, 2006.
dc.identifier.doi10.1016/j.polymdegradstab.2005.05.024
dc.identifier.issn0141-3910
dc.identifier.lattes6475585105456744
dc.identifier.urihttp://hdl.handle.net/11449/39669
dc.identifier.wosWOS:000236076400023
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofPolymer Degradation and Stability
dc.relation.ispartofjcr3.193
dc.relation.ispartofsjr1,041
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectkraft lignin derivativept
dc.subjectpoly(vinyl alcohol)pt
dc.subjectblendspt
dc.subjectNMRpt
dc.subjectFTIRpt
dc.subjectSEMpt
dc.titleThermal and photochemical stability of poly(vinyl alcohol)/modified lignin blendsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dspace.entity.typePublication
unesp.author.lattes6475585105456744[3]
unesp.author.orcid0000-0002-4435-2660[1]
unesp.author.orcid0000-0002-1979-8257[3]
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Ciências e Tecnologia, Presidente Prudentept
unesp.departmentFísica, Química e Biologia - FCTpt

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Presidente Prudente - FCT - Faculdade de Ciências e Tecnologia