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http://www.repositorio.ufop.br/jspui/handle/123456789/7789
Título: | Phenolic foams from wood tar resols. |
Autor(es): | Santos, Claudio Gouvea dos Pasa, Vanya Marcia Duarte Morais, Willy Ank de Pasa, Vanya Marcia Duarte |
Palavras-chave: | Henolics Cellular plastics Rigid foams Fractal dimension |
Data do documento: | 2010 |
Referência: | SANTOS, C. G. dos et al. Phenolic foams from wood tar resols. Journal of Applied Polymer Science , v. 115, p. 923-927, 2010. Disponível em: <http://onlinelibrary.wiley.com/doi/10.1002/app.30885/abstract>. Acesso em: 20 abr. 2017. |
Resumo: | This article investigates resole-type phenolic foams, in which 40% phenol was substituted with distilled oily fractions from wood tar. Different proportions of blowing agent, hexamethylenetetramine, and stabilizer, a sodium alkyl sulfate surface active agent, were used to produce a series of rigid foams, which were characterized by curing index, density and hardness. The average curing index was about 90% and densities ranged from 480 to 960 kg.m 3. A fractal dimension (Df) approach was used to assess the homogeneity of pores within the foams and an average (dimensionless) value of 2.6 was found, indicating a non uniform structure. Compressive strength tests of the foams gave values above 1.0 MPa, which is higher than those for typical phenolic foams. |
URI: | http://www.repositorio.ufop.br/handle/123456789/7789 |
Link para o artigo: | http://onlinelibrary.wiley.com/doi/10.1002/app.30885/abstract |
DOI: | https://doi.org/10.1002/app.30885 |
ISSN: | 1097-4628 |
Aparece nas coleções: | DEQUI - Artigos publicados em periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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ARTIGO_PhenolicFoamsWood.pdf Restricted Access | 134,75 kB | Adobe PDF | Visualizar/Abrir |
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