Thermal Behaviors of Polyamide-Layered Silicate Nanocomposites Based on 4 4″-Azodibenzoic Acid by Solution Intercalation Technique

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چکیده مقاله:

Two new samples of polyamide-montmorillonite reinforced nanocomposites based on 4,4″-azodibenzoic acid were prepared by a convenient solution intercalation technique. Polyamide (PA) 4 as a source of polymer matrix was synthesized by the direct polycondensation reac#on of 4,4″-azodibenzoic acid 2 with 4,4″-diamino diphenyl sulfone 3 in the presence of triphenyl phosphate (TPP), CaCl2, pyridine and N-methyl-2-pyrrolidone (NMP). Morphology and structure of the resulting PA-nanocomposite films 4a and 4b with 10 and 20% silicate particles were characterized by FTIR spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The effect of clay dispersion and the interaction between clay and polymeric chains on the properties of nanocomposite films were investigated by using Uv-vis spectroscopy, thermogravimetric analysis(TGA) and water uptake measurements