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Registros recuperados : 124 | |
61. | | KALIL FILHO, A. N.; WENDLING, I.; ROSOT, M. A. D.; LAZZAROTTO, M.; GUEDES, J. dos S. Determinação do fator de forma do cedro australiano (Toona ciliata M. Roem. var.australis (F. Muell.) Bahadur). Pesquisa Florestal Brasileira, Colombo, v. 39, (nesp), e201902043, 2019. p. 406. Edição especial dos resumos do IUFRO World Congress, 25., 2019, Curitiba. Biblioteca(s): Embrapa Florestas. |
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62. | | KALIL FILHO, A. N.; WENDLING, I.; ROSOT, M. A. D.; LAZZAROTTO, M.; GUEDES, J. dos S. Determinação do fator de forma do guanandi (Calophyllum brasiliense Cambess.). Pesquisa Florestal Brasileira, Colombo, v. 39, (nesp), e201902043, 2019. p. 406. Edição especial dos resumos do IUFRO World Congress, 25., 2019, Curitiba. Biblioteca(s): Embrapa Florestas. |
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63. | | WELKE, J. E.; BARBARÁ, J. A.; ZANUS, M. C.; LAZZAROTTO, M.; ZINI, C. A. Determination of the possible contribution to aroma using odor activity values of volatile compounds of wines analyzed by comprehensive two dimensional gas chromatography. In: CONGRESSO LATINOAMERICANO DE CROMATOGRAFIA Y TÉCNICAS AFINES, 15.; CONGRESSO COLOMBIANO DE CROMATOGRAFIA, 7., 2014, Cartagena de Indias, Colombia. Presentaciones en poster: alimientos y bebidas. Bogotá: Sociedad Colombiana de Ciencias Químicas, 2014. p. 205 Biblioteca(s): Embrapa Florestas; Embrapa Uva e Vinho. |
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64. | | MIRESKI, M. C.; MEDEIROS, A. C. de S.; WENDLING, I.; PEÑA PEÑA, M. L.; LAZZAROTTO, M. Seeds dehydration and embryonic development of Ilex paraguariensis. Informativo ABRATES, Brasília, DF, v. 25, n. 2, set. 2015. Edição de resumos do 19º Congresso Brasileiro de Sementes, Foz do Iguaçu, 2015. Biblioteca(s): Embrapa Florestas. |
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65. | | LEMES, B. M.; RISTOW, N.; BET, C. D.; OLIVEIRA, C. S.; LAZZAROTTO, M.; SCHNITZLER, E. Study of isolated starches of pinhão seeds marketed in the Brazilian Southern region. Brazilian Journal of Thermal Analysis, v. 6, n. 4, p. 39-47, 2017. Biblioteca(s): Embrapa Florestas. |
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66. | | HORNUNG, P. S.; LAZZAROTTO, S, R. da S.; OLIVEIRA, C. S. de; LAZZAROTTO, M.; SCHNITZLER, E. Simultaneous TG-DTA and DSC techniques on pinhão starch double modified. Brazilian Journal of Thermal Analysis, v. 7, p. 104-107, 2015. Disponível na internet. Edição dos Anais do 7º Simpósio de Análise Térmica, 2015, Bauru. Biblioteca(s): Embrapa Florestas. |
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74. | | LAZZAROTTO, M.; RIBEIRO, L. S.; CORDOBA, L. do P.; GODOY, R. C. B. de; SCHNITZLER, E. Thermal tool in the evaluation of the "pinhão'' (seed of Araucaria angustifolia) starch aimed agroindustrial process. Brazilian Journal of Thermal Analysis, v. 7, p. 144-147, 2015. Disponível na internet. Edição dos Anais do 7º Simpósio de Análise Térmica, 2015, Bauru. Biblioteca(s): Embrapa Florestas. |
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80. | | HORNUNG, P. S.; CORDOBA, L. do P.; LAZZAROTTO, S. R. da S.; SCHNITZLER, E.; LAZZAROTTO, M.; RIBANI, R. H. Brazilian dioscoreaceas starches: thermal, structural and rheological properties compared to commercial starches. Journal of Thermal Analysis and Calorimetry, v. 127, n. 3, p. 1869-1877, Mar. 2017. Biblioteca(s): Embrapa Florestas. |
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Registros recuperados : 124 | |
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Registro Completo
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
18/11/2014 |
Data da última atualização: |
18/11/2014 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
MATTOS, B.; LAZZAROTTO, M.; MAGALHAES, W. L. E.; GATTO, D. A. |
Afiliação: |
Bruno Dufau Mattos, PIPE, UFPR; MARCELO LAZZAROTTO, CNPF; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Darci Alberto Gatto, Universidade Federal de Pelotas. |
Título: |
Thermal tools to evaluation of decayed and weathered wood polymer composites prepared by in situ polymerization. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ANÁLISE TÉRMICA E CALORIMETRIA, 9., 2014, Serra Negra. Trabalhos. [S.l.]: ABRATEC, 2014. |
Páginas: |
6 p. |
Descrição Física: |
Disponibilizado online. |
Idioma: |
Inglês |
Notas: |
CBRATEC. |
Conteúdo: |
This 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, additives MenosThis 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, meanwhi... Mostrar Tudo |
Palavras-Chave: |
Compósito; DSC; Metacrilato; Methacrylate; Pinewood; Polímero; TGA. |
Thesagro: |
Aditivo; Madeira. |
Thesaurus NAL: |
additives. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/111823/1/2014-MarceloL-CBATC-ThermalTools.pdf
|
Marc: |
LEADER 02528nam a2200289 a 4500 001 2000392 005 2014-11-18 008 2014 bl uuuu u00u1 u #d 100 1 $aMATTOS, B. 245 $aThermal tools to evaluation of decayed and weathered wood polymer composites prepared by in situ polymerization.$h[electronic resource] 260 $aIn: CONGRESSO BRASILEIRO DE ANÁLISE TÉRMICA E CALORIMETRIA, 9., 2014, Serra Negra. Trabalhos. [S.l.]: ABRATEC$c2014 300 $a6 p.$cDisponibilizado online. 500 $aCBRATEC. 520 $aThis 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, additives 650 $aadditives 650 $aAditivo 650 $aMadeira 653 $aCompósito 653 $aDSC 653 $aMetacrilato 653 $aMethacrylate 653 $aPinewood 653 $aPolímero 653 $aTGA 700 1 $aLAZZAROTTO, M. 700 1 $aMAGALHAES, W. L. E. 700 1 $aGATTO, D. A.
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