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The purpose of this study was to obtain polyamide-6 nanocomposites with national organically modified clay (termed 12-montmorillonite). The formation of polyamide-6 was confirmed by infrared spectroscopy (IR), the prepared nanocomposites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). The evolution of mechanical properties was also studied. The obtained results confirm the intercalation of molecules of salt in the clay layers, and a good interaction with the polymer, showing the formation of intercalated and/or partially exfoliated structures. The nanocomposites showed higher thermal stability compared to pure polymer, and the mechanical properties presented interesting and promising results.

Mesoporous MCM-41 materials containing aluminum with different Si/Al ratios (20, 40, and 80) were synthesized under hydrothermal condition. The materials were characterized using X-ray diffraction (XRD), nitrogen adsorption, Fourier-transform infrared (FTIR), scanning electron microscopy (SEM), energydispersive x-ray (EDX), transmission electron microscopy (TEM), and NH 3 temperature programmed desorption (TPD) techniques. Incorporation of aluminum into MCM-41-type silica leads to creation of active and selective catalysts for condensation of pyrrole with 4-hydroxybenzaldehyde. The reaction was carried out at room temperature whilst stirring at 500 rpm. The catalyst Al-MCM-41 with Si/Al ratio of 20 produced a very high yield of [(pyrrole-2,5-diyl)-co-(benzylidene)]. The catalyst could be easily separated from the polymer product and regenerated by calcination.

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