Synthesis and Characterization of Novel Polyamide-imides Containing Thioether Linkages, Thiazole, and Nitrophenyl Units with High Solubility and Processability for Optical Film Applications

Document Type : Original Article

Author
Aazam Jalali
Department of Organic and Polymer Chemistry, Faculty of Chemistry, Kharazmi University, Tehran, Iran
10.22034/jams.2025.210133
Abstract
In this study, a novel diimide-diacid (DIDA) monomer featuring thiazole rings, nitrophenyl groups, and a thioether linkage has been introduced. Subsequently, several new sulfur-containing polyamide-imides (PAIs) were developed through the polycondensation reaction of DIDA with various aromatic diamines. This was achieved using a direct polycondensation method that employs triphenyl phosphite and pyridine. The resulting polymers were obtained in high yields, with inherent viscosities ranging from 0.73 to 0.92 dL/g. All synthesized polymers are amorphous and exhibit excellent solubility, easily dissolving in amide-type polar aprotic solvents such as N-methyl-2-pyrrolidone, dimethyl sulfoxide, N,N-dimethylacetamide, and dimethylformamide. Additionally, they can dissolve in less polar solvents like tetrahydrofuran, pyridine, and acetone. This solubility makes them promising candidates for the development of optical films, particularly given their confirmed high optical properties. The polymers also demonstrate good thermal stability, with a 10% weight loss occurring at temperatures ranging from 332.17 °C to 402.18 °C in a nitrogen atmosphere. Furthermore, the char yield of the synthesized polymers, defined as the percentage of solid residue remaining after heating from room temperature to 800 °C under nitrogen, ranges from 49.61% to 56.71%.

Keywords

Journal of Applied Material Science
Volume 1, Issue 1
Winter 2025 Article ID:210133

  • Receive Date 23 January 2025
  • Revise Date 17 February 2025
  • Accept Date 17 February 2025