ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Thermally stable, solution processable and redox active new poly(amide-imide)s: synthesis and characterization

Muhammad Inshad Khan, Asma Iqbal, Humaira Masood Siddiqi, Naveed Kausar Janjua, and Tehmina Maryam Butt

Department of Chemistry, Quaid-I-Azam University, Islamabad, Pakistan

E-mail: humairas@qau.edu.pk

Received: 4 August 2020  Accepted: 26 December 2020

Abstract:

A series of new poly(amide-imide)s was prepared by polycondensation of our already reported diamine, N,N’-[((propane-2,2-diylbis(4,1-phenylene) bis(oxy))bis(4,1-phenylene)]bis(4-aminobenzamide) (BDM) containing flexible ether and amide linkages with different aromatic dianhydrides via simple two-step method. The synthesized poly(amide-imide)s were characterized by FTIR spectroscopy and elemental analysis. These poly(amide-imide)s demonstrated nice solubility in most of the organic solvents at ambient temperature and upon heating. They also revealed great thermal stability and showed glass transition temperatures (Tgs) exceeding 150 °C in addition to the temperature of 10% weight loss (T₁₀) that fluctuated from 460 to 522 °C having more than 59% residual yield at 800 °C in nitrogen atmosphere indicating their flame retardant characteristics. Furthermore, they also showed interesting photoluminescent properties with blue green solution emission properties, redox activity, and lower onset oxidation potentials with appreciably shallow HOMO levels.

Keywords: Poly(amide-imide)s; Thermally stable; Flame retardant; Redox active; Blue–green emissive; Limiting oxygen index

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-020-01494-7

Chemical Papers 75 (8) 3711–3721 (2021)