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Synthesis, Characterization and A.C. Conductivity Study of Polypyrrole/Strontium Arsenate (Ceramic) Composites

Abstract

In-situ polymerization of pyrrole (Py) was carried out with strontium arsenate(ceramic)in the presence of oxidizing agent ammonium persulphate to synthesize polypyrrole (PPy)/ strontium arsenate[Sr3(AsO4)2]by chemical oxidation method. The PPy/Sr3(AsO4)2composites were synthesized with various compositions viz., 10, 20, 30, 40 and 50 wt. % ofSr3(AsO4)2 in Py. The surface morphologies of these composites were analyzed using Scanning Electron Microscopy (SEM) show that Sr3(AsO4)2 particles were embedded in PPy chain to form multiple phases. The Fourier Transform Infra-Red Spectroscopy (FTIR) reveals, the stretching frequencies were shifted towards higher frequency side. The powder X-ray diffraction (XRD) spectrograph suggests that, they exhibit semi-crystalline behavior. Thermograph of thermal analysis (TG/DTA) were shown that, the PPy/Sr3(AsO4)2composites have stronger stability than PPy. The frequency dependent A.C. conductivity reveals that, the Sr3(AsO4)2 concentration in PPy is responsible for the variation of conductivity of the composites. The value of the conductivity was increases for wt. 20% Sr3(AsO4)2in PPy. The dimensions of Sr3(AsO4)2 particles in the matrix have influence on the conductivity values.

Sangappa K Ganiger, Chaluvaraju B V, Murugendrappa M V

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