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ØIt can be assumed that the presence of nano–clay loading modified in this case, sepiolite with CTAB, has a promoting effect, according to the properties studied.
ØThe case of morphology seems to exert a compatibilizer effect between the two polymer phases, which originally polymers are not compatible, due to unrelated structures and their properties.
ØRegardingthermalstudies (calorimetric), the presence of this burden, seems to exert an influence as a nucleating agent, observed in the slight shift of the crystallization peak temperature for the cases shown.
ØAccording to the mechanical properties studied, this load, influence the changes listed in an increased stiffness of the material, even when the presence of PE, a sufficiently ductile material.
The use of thermoplastics and thermoplastic matrix composites has increased enormously in recent years. It has been said, the fillers are usually added to the polymer matrix in order to improve their thermal and mechanical characteristics. Consequently, considerable efforts have been made to find suitable reinforcing fillers. Filled with organic particles are commonly added to commercial thermoplastic resins to achieve economic as well as to favorably modify certain properties such as stiffness, heat distortion or heat and malleability. However, there are usually compensated with some important properties such as hardness and ultimate elongation at break, which usually deteriorate. In fact, one of the largest main disadvantages of using mineral filler is the use of processing equipment. Also, the properties of the composite are significantly affected by the type of materials and the mixing conditions.
Sepiolite is a magnesium–silicate fibrous, naturally occurring hydrated belonging to the family of the clay [Si12O30Mg8(OH)4(H2O) 4•8H2O] as the ideal formula of the unit cell. Similar to other types of silicate minerals, the structure of sepiolite can be described as consisting of talc a set of narrow bands formed by two layers of units (typically silica) dimensional tetrahedral T2O5 continuous (T = Si, Al, Be, etc.). Linked to a central octahedral sheet or non–continuous sheet of magnesium atoms by oxygen atoms by reversing the direction of O, SiO4 tetrahedral apical, ie the addresses of the apical ends of the tetrahedral sheet of silica reversed after six tetrahedral units. This feature determines the structure of needle–shaped particles, which have channels (3,6 x 10–6 Å) oriented along the fibers and can adsorb or fix water and other liquids by adsorption. Therefore, the rectangular channels occur or occur in the longitudinal direction of the strips. The sepiolite can have a surface area of up to 200–300 g/m2, 0,2 to 4 microns length, a width of 10–30 nm and thickness of 5–10 nm. Sepiolite usually appears stuck together to build bundles of fibers that can form micro–agglomerates. This fibrous structure with interior channels only allows the penetration of organic and inorganic ions in the structure of sepiolite and sepiolite as signed great importance to industrial applications sorptivity, rheological and catalytic properties.