Journal
SYNTHETIC METALS
Volume 160, Issue 15-16, Pages 1774-1779Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2010.06.019
Keywords
Conductive polymers; Morphology; Crystallinity
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Polyaniline-polyethylene glycol2000 (PAni-PEG2000) hybrid and sulphonated polyaniline (SPAni) were prepared using oxalic acid as dopant and potassium permanganate as oxidant. The properties of these two conductive polymers were studied in comparison with pure polyaniline (PAni) prepared using the same conditions. The investigated polymers were characterized using FTIR. UV-vis, TGA, TEM, SEM, XRD and their electrical conductivities were also investigated. The morphology of pure polymer was found to be flat ribbon-like form, while presence of polyethylene glycol led to the formation of separate nanospheres. The three polymer samples have different degrees of crystallinity, the highest degree is for SPAni. Unexpectedly, electrical conductivity is in the order SPAni > PAni-PEG2000 > PAni, aging of PAni increases gradually the conductivity of the polymer from 0.0056 to 0.023 S cm(-1) and the increase of temperature gradually decreases the conductivity. (C) 2010 Elsevier B.V. All rights reserved.
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