PREPARATION OF PD-CONTAINING POLYSULFONE FILM AND THE REACTION CHEMISTRY OF PD COMPLEX IN POLYSULFONE

Palladium (Pd) acetate complexes have been incorporated in polysulfone (PS) as a dispersion medium using cosolvent (tetrahydrofuran). The re sulting brown-colored [PS-Pd] films of 10-40 wt% complex concentration are thermally stable up to 140 degrees C. Upon incorporation of Pd me tal into PS, the glass transition temperatures of the films increase a s Pd metal concentration increases. The acetate ligands in [PS-Pd] fil ms are found to be substituted by Cl-1 or CN-1 ligands in aqueous solu tion. As a result of the relatively easy reduction of Pd(II) in PS to Pd(0), palladium metal particles in various sizes are observed to be f ormed in PS. The Pd complexes in PS show catalytic activities in hydro genation of ethylene, CO oxidation and NO reduction by CO or H-2 gases under relatively mild conditions.