Organically modified layered silicates as reinforcing fillers for natural rubber

Rubber compounds based on natural rubber containing organically modified montmorillonites were prepared. The state of dispersion of the clay was characterized by scanning and transmission electron microscopies, and the spacings between the silicate layers were evaluated by X-ray diffraction. The effect of the addition of clay on the elastomeric compound was analyzed through mechanical and swelling properties and also through the determination of polymer chain orientation during elongation.