Design and thermal evaluation of soluble polyazomethines based on 1,1-Bis[4-(4-benzaldehyde oxy)phenyl]cyclohexane

Polyazomethines (Schiff’s base polymers) are thermally stable and environmentally resistant materials with potential in optoelectronic and photonic applications. In this study, novel poly(ether-azomethine)s were synthesized via solution polycondensation of 1,1-bis[4-(4-benzaldehyde oxy)phenyl]cyclohexane (BBPC) with various commercial diamines. The structures were confirmed by FT-IR and NMR spectroscopy. The resulting polymers exhibited good solubility in aprotic solvents and inherent viscosities ranging from 0.22 to 0.45 dL/g, indicating moderate molecular weights. DSC and TGA analyses revealed glass transition temperatures (Tg) between 154 and 187 °C and excellent thermal stability, with decomposition temperatures up to 661 °C. XRD analysis showed that the polymers possessed partially crystalline to amorphous morphology. These findings suggest that the synthesized polymers are promising for high-performance thermal applications.