ALKANESULFONATION OF CYCLIC AND HIGH POLYMERIC PHOSPHAZENES

A method for sulfonating aminophosphazenes with the use of 1,3-propane sultone is described. The alkanesulfonation reactions were first devel oped with small molecule phosphazene cyclic trimers as models for high polymeric phosphazenes. High molecular weight poly(aminophosphazenes) were then sulfonated using similar techniques. The structure and prop erties of the alkanesulfonated polymers were examined by DSC, intrinsi c viscosity, and P-31, C-13, and H-1 NMR spectroscopy. This synthetic approach to sulfonated polymers is valuable for the development of new biomedical materials, membranes, reversibly cross-linkable polymers, surfactants, and polyelectrolytes.