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On the other hand, polymer /montmorillonite nanocomposites prepared by solid reaction,based on grinding MMT with monomers and reagents, have shown an alteration of chemicalstructure and properties of the material which are different from that carried out in solutionreaction. For example, in our previous work [7], it was concluded that conductingpolyaniline/MMT nanocomposite prepared by solid reaction presented enhanced electricalconductivity compared to free polyaniline. In addition it was shown that a ground mixture ofaniline salt and MMT is able to be converted with time to polyaniline clay nanocompositewithout the need to use an external oxidant [8]. On the other hand, the prolonged grinding ofFe-exchanged MMT with aniline salt favors the formation of a novel crystalline phase of ironoxide which is normally obtained at high pH [9]. These results demonstrate that grindingcould affect oxidant, acidic and electrical properties of MMT.
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