Studies on interfacial and sonochemically synthesized polyaniline nanofibers

Polyaniline, an important conducting polymer, has been synthesized by both interfacial and sonochemical methods. UV-Visible spectra reveal that the degree of polymerization and fiber length highly depend on the method used for synthesis. The fibrous nature of emeraldine base of polyaniline has been studied by SEM micrographs. These fibers are of nano-dimensions with orthorhombic crystal symmetry. The percentage crystallinity of polyaniline has been investigated using powder X-ray diffraction analysis, where the percentage crystallinity of interfacially synthesized polyaniline is 12% more than sonochemically synthesized polyaniline. This paper reveals that with the change in crystallinity, there is a remarkable change in % transmittance, bathochromic shift and fibrous nature of polymer

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