Thermal stability, degradation kinetic and structural characterization of novel aromatic amide compounds

Abstract

In this study, six novel amide compounds with three different structures were synthesized. At the beginning of the study, two novel amide compounds were formed using 3,7-Dihydroxy-2-naphthoic acid, 2-Amino-5-methylphenol and 2-Amino-3-chloro-phenol as basic materials. Then, the polymerization of the synthesized amide compounds were conducted with oxidative polycondensation method in which NaOCl was used as oxidant. Finally, copper complexes were synthesized using polymers as ligand. All synthesized compounds have been characterized by IR, UV-vis and H NMR spectral studies, LC-MS and GPC chromatographic studies, and SEM analysis. Thermal stabilities of amide monomers, polymers and copper complexes were determined by TGA technique. Furthermore, thermodynamic parameters of the degradation process were determined for all synthesized compounds with the use of non-isothermal method: Flynn-Wall-Ozawa method. The variation of the heating rate at TGA technique has allowed us to investigate and discuss the influence of different heating rates on decomposition of the compounds. (C) 2020 Elsevier B.V. All rights reserved.