A new flame-retardant polyamide containing phosphine oxide and azobenzene moieties in the main chain was synthesized by the solution polycondensation reaction of 4,4`-azodibenzoic acid with bis(3-aminophenyl) phenyl phosphine oxide using thionyl chloride, N-methyl-2-pyrrolidone and pyridine. This new polymer was obtained in high yield (96%) and showed high inherent viscosity (0.55 dL/g) and was characterized by elemental analysis, FT-IR spectroscopy, thermal gravimetric analysis (TGA and DTG) and solubility test. Furthermore, another polyamide was prepared by solution polycondensation reaction of 4,4`-azodibenzoic acid with 1,4-phenylene diamine and its flame-retardant behavior was compared by the use of the LOI with the previous one.
Flame-retardant polymers, phosphine oxide moieties, 4, 4`-azodibenzoic acid
FAGHIHI, KHALIL and HAGIBEYGI, MOHSEN (2007) "New Aromatic Polyamide with Azo and Phosphine Oxide Groups in the Main Chain," Turkish Journal of Chemistry: Vol. 31: No. 1, Article 8. Available at: https://journals.tubitak.gov.tr/chem/vol31/iss1/8