Abstract: There is a critical value(velocity gradient Xviscosity) at which the shear-induced plane compresion causes the slices of montmorillonite(MMT) to buckle and produces a cuneate space between the outside slice and the crystallite during the melt intercalation.The outest slice can be broken when it bends exceed the minimal curvature radius and yields exfoliation further.The appropriate intensity of flow is the key point of getting suitable slice configuration in the nano-composition process.

Key words: Montmorillonite (MMT), Exfoliate, Bending, Breakage