the polymer/composite materials, rigid inorganic particles, the impact toughness increase with two factors: First, resin dispersion of the impact energy capacity; second rigid inorganic particles in the surface of the impact energy absorptive capacity. Its impact on these two factors can not entirely be allocated according to volume fraction, but the thickness of L and the grass-roots. Lc is the critical toughening the matrix resin, the thickness of its impact energy and absorbed by the surface of rigid inorganic particles can impact the relationship between primary and secondary transition point. When L> Lc, the impact can be assigned according to the volume fraction of resin and inorganic rigid particles.
Therefore, unit volume of its impact on resin can be the same, that same toughness; when L Nanocomposite stiffness and strength increase is due to the nano-particle radius, the large surface area, quite a lot of surface atoms, the physical and chemical defects in the surface more easily and the polymer chain for physical or chemical combination, an increase of rigidity, increased strength and heat resistance.
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