چكيده لاتين :
Physical properties and thermal behaviours of polymers vary by molecular weight or
stereoisomers. These properties also change in the presence of polymeric and nonpolymeric
additives. Conductive polymers are insoluble in original organic solvents
and their processibility are limited. In this research, the processible conducting polymers
are synthesized and their electrical properties and thermal behaviour are studied. The
blends of polyvinyl acetate (PVAc), polystyrene (PS) and polyvinyl chloride (PVC) with
polypyrrole (PPy) and polyaniline (PANi) are prepared. On the other hand, the percentages
of compounds of these blends for suitable electrical properties, solubility and
processability are optimized. All the samples were prepared in the smooth form and thin
film. A four-point probe method is adopted to examine the electrical DC conductivity. It is
found that the conductivity of the blends is decreased but their processibility and solubility
are increased. Thermal stability of polypyrrole and polyaniline blends were investigated
by scanning thermal analysis (STA), differential scanning calorimetry (DSC) and thermal
gravimetrical analysis (TGA). As it is evident from the results, the prepared blends are
much more stable compared with polypyrrole. polyaniline and host polymers.
