PREPARATION AND CHARACTERIZATION OF SULFONATED POLY(PHENYLENE OXIDE)

Sulfonated poly(2,6-dimethyl phenylene oxide) (SPPO) has been prepared through the reaction of PPO and fuming sulfuric acid in the media of chloroform. The effect of the amount of sulfuric acid on sulfonation c ontents has also been discussed. The structure of SPPO was characteriz ed by using FT-IR, H-1 NMR, C-13 NMR and other analysis methods. Condu ctimetric titration, elemental analysis and H-1 NMR were used to deter mine the sulfonation contents of SPPO, i.e., the percentage of sulfona ted units.