Synthesis and characterization of thermally stable and flame retardant hexakis(4-aminophenoxy)cyclotriphosphazene-based polyimide matrices

ABSTRACTA new approach to the preparation of hexakis(4-aminophenoxy)cyclotriphosphazene (HACTP) based polyimide (PI) matrices is proposed, for improved thermal and flame retardant properties. HACTP was synthesized with good yield. The structure of HACTP was confirmed by various characterization techniques, such as FTIR, NMR, and mass Spectroscopy. Polyimide matrices were prepared by thermal imidization process using HACTP and dianhydrides using N-methyl pyrrolidone as a solvent. The successful formation of HACTP-based polyimide matrices was confirmed by the FTIR. Thermal properties of the PI were analyzed using DSC and TGA techniques. Data obtained from the thermal studies indicate that the HACTP-based PI possesses better thermal and flame retardant properties.