PHOSPHORUS-CONTAINING POLYMERS .5. POLYAZOXYPHOSPHONATE

A new polyazoxyphosphonate was synthesized by reaction of 4-4'dihydrox yazoxybenzene and dichlorophenyl phospine oxide by interfacial polycon densation using a phase transfer catalyst. The polymer was characteriz ed and the results obtained by various analytical techniques indicate that it is mostly amorphous, low molecular weight and soluble in organ ic solvents such as DMF, DMAC, NMP; etc. The high char residue (simila r to 40%) and limiting oxygen index indicate flame retardancy of the p olymer which is due to phosphorus. Thermal stability of this polymer i s moderate. The T-g appears to be at 152 degrees C.