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Synthesis of magnesium hydroxide nanofiller and its use for improving thermal properties of new poly(ether-amide)



A new poly(ether-amide; PEA) as a source of polymeric matrix, containing flexible ether group in the main chain was synthesized by direct polycondensation reaction of 1,2-(4-carboxy phenoxy)ethane with 4,4-diaminodiphenyl ether in a medium consisting of N-methyl-2-pyrrolidone, triphenyl phosphite, calcium chloride, and pyridine. The resulting PEA was characterized by gel permeation chromatography (GPC), 1H NMR and FT-IR spectroscopy. Magnesium Hydroxide (MH) nanostructure was synthesized by the reaction of magnesium sulfate and sodium hydroxide by sonochemical method. The MH particle was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Then Mg(OH)2 nanostructure was added to poly(ether-amide) matrix and resulting nanocomposites were characterized by XRD, SEM, and Thermogravimetry Analysis (TGA). Thermal decomposition of the PEA shifted towards higher temperature in the presence of the magnesium hydroxide nanoparticles. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013