Polyphenylene sulfide sulfone PPSS

PPSS polyphenylene sulfide sulfone PSS polystyrene sulphonate... 

Polyphenylene Sulfide Sulfone Thermoplastic has good heat, fire, creep, and chemical resistance and dielectric properties. Processed by injection molding. Used in electrical devices. Also called PPSS. 

The second way is to synthesize block copolymers. Terada et al. [173,174] demonstrated that these polymers of which at least one contains an ammonium group (Fig. 5.22) exhibited better mechanical properties than the traditional copolymers. Hwang and Ohya [175] prepared an AEM, polysulfone/polyphenylene sulfide sulfone (PS/PPSS), by using block copolymers. The synthesis was realized in four steps. The resistance of the membranes was between 0.9 and 1.4 i2/cm, depending on the degree of quatemization, and the lEC was between 1.46 and 3.7 X 10 equiv./g. 

---