Abstract

A series of conducting polymer polypyrrole (PPy) and polypyrrole/cadmium sulfide (PPy/CdS) composites were successfully synthesized using the chemical reaction method. PPy/CdS composites were prepared with CdS concentration percentages ranging from 2 to 10%. From the X-ray diffraction (XRD) results, the XRD pattern showed evidence of conducting structure of polymer PPy and PPy/CdS composites. The spectrum clearly indicated that PPy polymer was amorphous. From the PPy/CdS composites spectrum, the six major peaks that were observed for all the samples were well known peaks that originated from CdS. From the results obtained, it shows that the conductivity of conducting polymer PPy and PPy/CdS composites at the low temperature range increased with the increase in percentage of CdS. The electrical conductivity increased from 2.85 × 10^-7 to 1.66 × 10^-5 S/cm in the low temperature range of 100 to 300K. While for the PPy/CdS composites, the increase of conductivity showed the same trend with the low temperature studied where the values increase from 2.11 × 10^-5 to 8.74 × 10^-5 S/cm.

Key words: Conducting polymer, polypyrrole, polypyrrole/cadmium sulfide composites, electrical Conductivity.