High-Quality Synthesis of Terephthalamide from Secondary PET Waste

The article studies the two-step process of Terephthalamide synthesis, which is used to produce various polymers, pigments, and antioxidants. In the production of Terephthalamide, the relevant raw material, terephthalic acid, was synthesized from PET waste using a high-yield reaction method. Terephthalamide was synthesized from the obtained terephthalic acid. The effect of pressure, mass ratio of starting materials, temperature, and catalyst was studied to increase the reaction yield. Graphs and diagrams were constructed according to the reaction results. At the same time, the IR spectrum and Raman spectrum of the obtained Terephthalamide were obtained and analyzed. Also, the molecular structure, dynamics of intermolecular interactions, and thermal properties were studied using NMR analysis, TGA, and DTA analysis methods. Based on the results of the analysis, it was proven that the product obtained was terephthaldiamide.

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