Interaction of metal ions with polypyrrole on polyacrylic acid matrix

The oxidative matrix polyrmerization of pyrrole (Py) by Fe(III), Cu(II), Ni (II), Co(II), and Zn(II) in the presence of polyacrylic acid (PAA) was stud ied and water-soluble products along with insoluble products were obtained. The metal (Me) content of the insoluble part was determined by using atomi c absorption spectroscopy (AAS). The effects of the oxidation potential of Me ions and ligands on the aggregation of polypyrrole (PPy) on the matrix p olymer were measured by ultraviolet (UV)-visible spectra. These findings al so were checked by cyclic voltammetry (CV) measurements on PAA-Cu and PAA-P Py-Cu interactions. The conductonnetric titration results of PAA-PPy-Me ter nary solutions were explained in the light of the interaction of Me ions wi th Py to polymerize on the PAA matrix resulting in some free carboxyl group s with a possibility of having Me-polymer complexes and a ternary complex ( PAA-Me-PPy). The insoluble products were characterized by Fourier transform infrared (FTIR), elemental analysis, scanning electron microscopy (SEM), a nd four point probe conductivity measurements. (C) 1999 John Wiley & Sons, Inc.