Título:	Color changes of wood from Pinus taeda and Schizolobium parahybum treated by in situ polymerization of methyl methacrylate using cross-linkers.
Autoria:	MATTOS, B. D. MISSIO, A. L. CADEMARTORI, P. H. G. de GATTO, D. A. MAGALHAES, W. L. E.
Afiliação:	Bruno D. Mattos, Integrated program in Engineering & Materials Science (PIPE), UFPR; André L. Missio, Forestry Engineering (PPGEF), UFSM; Pedro H. G. de Cademartori, Wood and Forestry Science Center (PPGEF), UFPR; Darci A. Gatto, Professor da UFSM; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF.
Ano de publicação:	2016
Referência:	Maderas. Ciencia y tecnología, Concepción, v. 18, n. 1, p. 113-124, ene. 2016.
Conteúdo:	The aim of this study was to evaluate the colorimetric properties of Pinus taeda and Schizolobium parahybum woods treated by in situ polymerization. The wood samples were impregnated in a vacuum/ pressure system and polymerized in an oven at 90°C for 10h, using benzoyl peroxide at 1,5wt% as the catalyst. The treatments were characterized using attenuated total reflectance infrared (ATRIR) spectroscopy and weight percentage gain (WPG). The color evaluation was performed using CIEL*a*b* concepts, specular gloss, and UV-Visible spectrophotometry. Treated woods showed increases in band intensity related to polymers (1730, 1460 and 1145 cm-1), and WPG ranged from 39 to 164%, depending of the wood species and treatments. Lightness decreased, while the Chroma, gloss and the color coordinates increased. A darkening of the all treated samples was observed, and confirmed by the decrease in the reflectance intensity between 400 and 700 nm.
Thesagro:	Madeira Tratamento Espécie nativa Pinus Taeda
NAL Thesaurus:	Wood treatment Polymers
Palavras-chave:	Schizolobium parahybum Espécie exótica Free radical polymerization UV-Vis Heat catalyst Composites (materials)
Digital Object Identifier:	10.4067/S0718-221X2016005000012
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPF)