info:eu-repo/semantics/article
Effect of natural rubber on wood-reinforced tannin composites
Fecha
2007-08Registro en:
Mosiewicki, Mirna Alejandra; Aranguren, Mirta Ines; Curvelo, A. A. S.; Borrajo Fernandez, Julio; Effect of natural rubber on wood-reinforced tannin composites; John Wiley & Sons Ltd; Journal of Applied Polymer Science; 105; 4; 8-2007; 1825-1832
0021-8995
CONICET Digital
CONICET
Autor
Mosiewicki, Mirna Alejandra
Aranguren, Mirta Ines
Curvelo, A. A. S.
Borrajo Fernandez, Julio
Resumen
Natural rubber latex was added to composite materials formulated from a quebracho tannin adhesive crosslinked with hexamethylenetetramine and wood flour as a reinforcing filler. The final microstructure of the thermoset modified by the addition of different concentrations of latex was observed by scanning electron microscopy. The flexural and impact behavior of the modified materials was analyzed and related to the final microstructure of the composites. The effect of exposing the materials to humid environments was also evaluated. The measurements indicated that the addition of latex did not significantly reduce water absorption. However, it facilitated the preparation process of samples with low filler contents because of the increased viscosity of the mixture, which inhibited particle settling. On the other hand, the flexural properties increased with the addition of latex-containing proteins through a reaction similar to tanning in leathers. The impact properties presented a similar trend, with the largest change occurring between 0 and 5% natural rubber in the matrix formulation.