Synthesis of novel flame retardant polyamidophosphate esters from aromatic diols and N-arylphosphoramidic dichlorides

Several new polyamidophosphate esters were synthesized by the solution polycondensation of aromatic diols with N-aryl phosphoramidic dichlorides. The polymers were characterized by the IR and$^ 1H,^{13}C$ and$^{31}P NMR$ spectroscopy. From their thermal stability and flammability data, these polymers reveal their capacity as potential flame-retardants. Structural dependancy on flammability seems to be discernible in these polymers