One-Pot Synthesis of Polymer-Aluminosilicate Coating Materials from Heterogeneous Polymer Blends

The possibility of using one-pot melt blending for the synthesis of polymer-aluminosilicate nanocomposites from heterogeneous polymer blends is studied. The polyolefin composition containing recycled polyethylene and designed for the anticorrosion protection of pipelines is used as a polymer matrix. The advisability of using one-pot blending procedure for the synthesis of composites from polymers processed by extrusion is substantiated. Formation of the intercalated structure of the nanocomposite in the system under consideration is verified experimentally. The nanostructure of an organoclay in the composites obtained by the conventional method (polymer blending with organoclay) and the one-pot procedure (polymer blending with natural clay and organomodifier) is found to be almost the same. It is shown that the physicomechanical characteristics of the nanocomposites synthesized by different methods are also similar. Resistance of organoclay structure formed in the polymer composite against sodium chloride aqueous solution is investigated by X-ray diffraction. It is revealed that the structure of the nanocomposites obtained by different methods remains almost unchanged during their swelling in water and subsequent drying which provides evidence that modification of the clay during blending with the polymer matrix is complete and the composite does not contain nonmodified clay swelling in water.