Abstract
ABSTRACTConducting polymers namely polyaniline (PANI), polypyrrole (PPy) and their copolymer poly(Aniline-co-Pyrrole)(PAPY) were prepared via in-situ polymerization process. The X-ray diffraction (XRD), infra-red (IR)and field emission-scanning electron microscopy (FESEM) studies confirm the formation of polyaniline, polypyrrole and their copolymer with aniline and pyrrole. The XRD pattern of copolymer displayed an amorphous structure as compared to polycrystalline homopolymers. FE-SEM results of Poly (Ani-co-Py) shows the existence of agglomerated spherical structured particles in the copolymer matrix, while the polyaniline and polypyrrole exhibit the porous tubular and spherical structures, respectively. Thermo gravimetric analysis (TGA) shows that the copolymer is more stable as compared to their homopolymers at higher temperature. Four probe resistivity (FPR) studies indicate that copolymer has the lower conductivity and act as a diode. Vector network analyzer (VNA) measurements observe a significant shielding effectiveness (SE) for all the conducting polymers.
Published Version
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