Abstract
Herein, the diffusion behavior of the photo-polymeric coatings formed by various reactive diluents with different functionalities was studied using electrochemical impedance spectroscopy technique. Scanning electron microscopy, atomic force microscopy and dynamic mechanical analysis techniques were used to investigate the dynamic and structural heterogeneity of the photo-polymeric networks. It was found that the photo-polymerization-induced nano-gelation process leads to slip-stick diffusion of charge carriers through the photo-polymeric coatings. The lowest values of the apparent diffusion coefficient of the charge carriers through the nano-gel domains were obtained for the coatings formed by the highest amount of reactive diluent. The lowest and the highest value of the apparent diffusion coefficient were estimated to be 8 and 125 μm2/s, respectively.
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