Data/hora: 12/06/2024 12:08:02

Biblioteca(s): 	Embrapa Florestas.	
Tipo da produção científica: 	Artigo em Periódico Indexado	
Circulação/Nível: 	A - 2	
Data corrente: 	22/10/2014	
Data da última atualização: 	12/12/2014	
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: 	--	
Registro original: 	Embrapa Florestas (CNPF)	
Exemplares: 	CNPF - (52848-1) - UPC - AP - DD -  -  -  - DIS