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Journal of Nanomaterials
Volume 2009, Article ID 136856, 5 pages
Research Article

Polyamide 66/Brazilian Clay Nanocomposites

1Department of Materials Engineering, Federal University of Campina Grande, Avenida Aprígio Veloso, 882, Bodocongó, CEP 58429-900, Campina Grande, PB, Brazil
2Department of Materials Engineering, Federal University of São Carlos, CEP 13565-905, São Carlos, SP, Brazil

Received 7 July 2008; Accepted 10 October 2008

Academic Editor: Jose A. Pomposo

Copyright © 2009 E. M. Araújo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Polyamide 66 (PA66)/Brazilian clay nanocomposites were produced via direct melt intercalation. A montmorillonite sample from the Brazilian state of Paraíba was organically modified with esthearildimethylammonium chloride (Praepagen), quaternary ammonium salt and has been tested to be used in polymer nanocomposites. The dispersion analysis and the interlayer spacing of the clay particles in matrix were investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Thermal behavior of the obtained systems was investigated by differential scanning calorimetry (DSC), thermogravimetry (TG), and heat deflection temperature (HDT) was reported too. The nanocomposites exhibited a partially exfoliated structure, very interesting HDT values which are higher than those of pure PA66, and good thermal stability.