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166. | | ZENI, T. L.; SILVA, F. B.; FERREIRA, M. M.; MAGALHÃES, W. L. E.; AUER, C. G. Resistência natural das espécies Eucalyptus cloeziana, Eucalyptus mycrocoris, Eucalyptus umbra, Corymbia citriodora e Corymbia maculata à degradação provocada pelo fungo Agrocybe perfecta, causador da podridão branca na madeira, in vitro. In: ENCONTRO BRASILEIRO EM MADEIRAS E EM ESTRUTURAS DE MADEIRA, 10., 2006, São Pedro. Anais. São Carlos: Instituto Brasileiro da Madeira e das Estruturas de Madeira, 2006. 1 CD-ROM. EBRAMEM. Biblioteca(s): Embrapa Florestas. |
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Registros recuperados : 424 | |
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Registro Completo
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
22/10/2014 |
Data da última atualização: |
12/12/2014 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
MATTOS, B.; SERRANO, L.; GATTO, D.; MAGALHAES, W. L. E.; LABIDI, J. |
Afiliação: |
Bruno dUFAU Mattos, Federal University of Pelotas; Luis Serrano, University of the Basque Country; Darci Gatto, Federal University of Pelotas; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Jalel Labidi, University of the Basque Country. |
Título: |
Thermochemical and hygroscopicity properties of pinewood treated by in situ copolymerisation with methacrylate monomers. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Thermochimica Acta, n. 596, p. 70-78, 2014. |
DOI: |
http://dx.doi.org/10.1016/j.tca.2014.09.018 |
Idioma: |
Inglês |
Conteúdo: |
This study aims to evaluate the hygroscopicity and thermochemical properties of pine wood/polymer composites prepared by in situ polymerisation 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 polymerised in an oven at 90 C for 10 h, using benzoyl peroxide at 1.5 wt.% as catalyst. The composite was characterised through dynamic wettability, water uptake and dimensional stability tests, ATR-IR spectroscopy, TGA, and DSC. ATR-IR spectra show an increase of the peaks at 1746, 1460, and 1145 cm1 corresponding to the chemical structures of the polymers into the pores and capillaries of treated wood. The TGA and DSC analysis pointed out a chemical interaction between the copolymer and the wood cell wall in composites with GMA and MAA. The composites prepared with MMA presented improvements for the hygroscopicity and dimensional stability properties by 50%. However, the addition of GMA and MAA resulted in the best increases for hydrophobicity and dimensional stability of the samples, 65?78%. |
Palavras-Chave: |
Compósito; Fast growing pinewood; Free radical polymerisation; Heat catalyst; Polímero; Propriedade higroscópica; Propriedade termoquímica. |
Thesagro: |
Madeira; Tratamento. |
Thesaurus NAL: |
crosslinking; Pinus. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02069naa a2200313 a 4500 001 1998011 005 2014-12-12 008 2014 bl uuuu u00u1 u #d 024 7 $ahttp://dx.doi.org/10.1016/j.tca.2014.09.018$2DOI 100 1 $aMATTOS, B. 245 $aThermochemical and hygroscopicity properties of pinewood treated by in situ copolymerisation with methacrylate monomers.$h[electronic resource] 260 $c2014 520 $aThis study aims to evaluate the hygroscopicity and thermochemical properties of pine wood/polymer composites prepared by in situ polymerisation 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 polymerised in an oven at 90 C for 10 h, using benzoyl peroxide at 1.5 wt.% as catalyst. The composite was characterised through dynamic wettability, water uptake and dimensional stability tests, ATR-IR spectroscopy, TGA, and DSC. ATR-IR spectra show an increase of the peaks at 1746, 1460, and 1145 cm1 corresponding to the chemical structures of the polymers into the pores and capillaries of treated wood. The TGA and DSC analysis pointed out a chemical interaction between the copolymer and the wood cell wall in composites with GMA and MAA. The composites prepared with MMA presented improvements for the hygroscopicity and dimensional stability properties by 50%. However, the addition of GMA and MAA resulted in the best increases for hydrophobicity and dimensional stability of the samples, 65?78%. 650 $acrosslinking 650 $aPinus 650 $aMadeira 650 $aTratamento 653 $aCompósito 653 $aFast growing pinewood 653 $aFree radical polymerisation 653 $aHeat catalyst 653 $aPolímero 653 $aPropriedade higroscópica 653 $aPropriedade termoquímica 700 1 $aSERRANO, L. 700 1 $aGATTO, D. 700 1 $aMAGALHAES, W. L. E. 700 1 $aLABIDI, J. 773 $tThermochimica Acta$gn. 596, p. 70-78, 2014.
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