Abstract
Composite films based on polypyrrole (PPy) and polyethylene glycol (PEG) were synthesized on titanium electrode, using various percentages of PEG, as the insulating material in order to enhance surface properties of the polymer composite films. The Fourier transform infrared spectroscopy (FT-IR) was performed to demonstrate the formation of a PPy-PEG composite film. The corrosion behaviour of coatings has been studied by Tafel tests and cyclic voltammetry. The PPy-PEG films/electrolyte interface was analyzed by electrochemical impedance spectroscopy (EIS) and the specific parameters of corresponding equivalent circuits were calculated. The polymeric layer morphology on titanium substrate has been evaluated using atomic force microscopy (AFM) and enhanced properties of the PPy-PEG films are discussed as the effect of PEG incorporation in the polypyrrole structure.
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