TEMPERATURE IMPACT ON PROPERTIES OF Fe_xO_y-PPy NANOCOMPOSITES
D.-V. BREZOI, R.-M. ION

Abstract. The transition behavior for various iron oxide–polypyrrole compositions was investigated with the help of differential scanning calorimeter. Two distinct thermal transitions have been observed on iron oxide–polypyrrole nanocomposites prepared by simultaneous gelation and polymerization process: a transition from magnetic phase (γ-Fe₂O₃) to nonmagnetic phase (α-Fe₂O₃) of iron oxides in the temperatures’ range 410–450°C and polypyrrole degradation at 373°C. The iron oxide–polypyrrole nanocomposites annealed at different temperatures were found to be magnetic with the magnetization values decreasing with increasing annealing temperature.