PHOSPHORUS-CONTAINING POLYMERS .3. POLYIMIDOPHOSPHONATES

Synthesis of dihydroxybisimide monomers and their subsequent polyconde nsation with dichlorophenylphosphine oxide by use of a phase-transfer catalyst are reported. The monomers were characterized by melting poin t, elemental analysis, and IR spectroscopy. The polyimidophosphonates were characterized by viscosity measurement, molecular weight determin ation, elemental analysis, IR, ESCA, H-1-NMR, P-31-NMR, and X-ray diff raction. Thermal stability and glass transition temperature (T,) of th e polymers were evaluated by TGA, DTA, and TMA. These polymers are sel f-extinguishing and readily soluble in highly polar solvents like DMF, DMSO, DMAC, NMP, HMPA, etc. (C) 1994 John Wiley & Sons, Inc.