Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1000392
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dc.contributor.authorMATTOS, B.pt_BR
dc.contributor.authorLAZZAROTTO, M.pt_BR
dc.contributor.authorMAGALHAES, W. L. E.pt_BR
dc.contributor.authorGATTO, D. A.pt_BR
dc.date.accessioned2014-11-18T11:11:11Zpt_BR
dc.date.available2014-11-18T11:11:11Zpt_BR
dc.date.created2014-11-18pt_BR
dc.date.issued2014pt_BR
dc.identifier.citationIn: CONGRESSO BRASILEIRO DE ANÁLISE TÉRMICA E CALORIMETRIA, 9., 2014, Serra Negra. Trabalhos. [S.l.]: ABRATEC, 2014.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1000392pt_BR
dc.descriptionThis study aims to apply thermal tools in the evaluation of decayed and weathered wood polymer composites prepared by in situ polymerization of methyl methacrylate (MMA) using glycidyl methacrylate (GMA) and methacrylic acid (MAA) as cross-linkers. The pine wood samples were impregnated in a vacuum/pressure system and polymerized in an oven at 90°C for 10h, using benzoyl peroxide at 1.5 wt% as catalyst. The untreated wood and composites were exposed to in vitro decay tests with Trametes versicolor and Gloeophyllum trabeum fungi, and to artificial weathering. The weight loss after tests was measured, and the characterization was performed by thermogravimetric (TGA) and differential scanning calorimetry (DSC) analysis. The mass loss caused by exposure to fungi was evidently higher in untreated wood in relation to the composites, ~2.5 to 10 times - the composites with GMA and MAA showed the highest resistance to both fungi. The composites without cross-linkers showed the higher mass loss in the artificial weathering tests (>11%), due to the leaching of part of poly(MMA) formed inside wood. By TGA and DSC analysis, we observed shifting in the temperature of thermal events related to polysaccharides and lignin after exposed to decays tests ? more significant changes were for Trametes versicolor tests. The thermograms related to weathered samples showed different results for each composite. The untreated wood and the composite without cross-linker presented loss in lignin, meanwhile the composites with cross-linkers presented degradation in the copolymer formed onto surface of wood. Keywords: TGA, DSC, pinewood, methacrylate, additivespt_BR
dc.formatDisponibilizado online.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectCompósitopt_BR
dc.subjectPolímeropt_BR
dc.subjectMetacrilatopt_BR
dc.subjectTGApt_BR
dc.subjectDSCpt_BR
dc.subjectPinewoodpt_BR
dc.subjectMethacrylatept_BR
dc.titleThermal tools to evaluation of decayed and weathered wood polymer composites prepared by in situ polymerization.pt_BR
dc.typeArtigo em anais e proceedingspt_BR
dc.date.updated2014-11-18T11:11:11Zpt_BR
dc.subject.thesagroAditivopt_BR
dc.subject.thesagroMadeirapt_BR
dc.subject.nalthesaurusadditivespt_BR
dc.description.notesCBRATEC.pt_BR
dc.format.extent26 p.pt_BR
riaa.ainfo.id1000392pt_BR
riaa.ainfo.lastupdate2014-11-18pt_BR
dc.contributor.institutionBruno Dufau Mattos, PIPE, UFPR; MARCELO LAZZAROTTO, CNPF; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Darci Alberto Gatto, Universidade Federal de Pelotas.pt_BR
Appears in Collections:Artigo em anais de congresso (CNPF)

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