| 초록 |
Unsubstituted polythiophenes(PTs) with high electrical conductivity were synthesized in anhydrous medium via chemical oxidative polymerization. Obtained PTs were characterized by different techniques: Fourier transform infrared spectroscopy (FTIR), wide-angle X-ray differaction (WAXD), scanning electron microscopy (SEM), thermogravimetry analysis(TGA), ultraviolet-visible spectroscopy (UV-Vis), and four-point probe conductivity measurement. The polymerization yield, electrical conductivity have been optimized by adjusting the thiophene/FeCl3 (monomer/oxidant) molar ratio, polymerization temperature, and reaction time. The highest conductivity of PT was 5.53 S/cm prepared in thiophene/FeCl3 (monomer/oxidant) molar ratio of 1:5, at 0℃, 10min. We confirmed the morphology of polythiophene which is consisted of nano-sized spherical particles. Typical diameters of particles are found to be from 100nm to 200nm. The XRD pattern showed amorphous and intermolecular π-π stacking structure. |
