Thermogravimetric analyses (TGAs) of polymer powders (about 5 mg) were conducted on a Du Pont Thermal Analyst 2100 system with a TGA 2950 thermogravimetric analyzer. A heating rate of 10 C/min with an air flow of 75 ml/min was used, the runs being conducted from room temperature to 800 C. Conductivity measurements were carried out on a four-point probe connected to a Keithley 220 programmable current source and a 2000 multimeter system. Scanning electron micrographs were obtained on a JEOL JSM-35CF scanning electron-microscope. GPC analyses were carried out using a Perkin Elmer Model 200 HPLC system with Phenogel MXL and MXM columns (300 mm ยด4.6 mm I.D.) calibrated using polystyrene standards and THF as eluent. Electrochemical polymerization and cyclic voltammetry in 2 M HCl were performed with an EG&G Model 273 potentiostat/galvanostat controlled by the EG&G M270 electrochemical software. X-ray photoelectron spectroscopy (XPS) analysis was performed on a VG ESCA/SIMLAB MKII spectrometer equipped with a Mg K a radiation source. All core-level spectra were corrected for surface charging by reference to the designated C(1s) binding energy at 285.0 eV. Spectra deconvolutions were carried out using a Gaussian component with the same full width at half maximum (FWHM) for each component in a particular spectrum.