Preparation, morphology and electrical properties of multi-layer conductively coated PMMA: Effect of number and order of layers

In this study an electrically conductive polythiophene (PTh) and polypyrrole (PPy) layer was deposited on poly methyl methacrylate (PMMA) substrate by in-situ chemical oxidative deposition method, using FeCl3 as catalyst, water and acetronitrile as solvent for synthesis of polypyrrole and acetonitrile as solvent for synthesis of polythiophene. Based on electrical properties of the deposited layers, the reaction time was optimized at 12 minutes for the synthesis of PTh and at 20 minutes for synthesis of PPy. FT-IR spectroscopy was used to detect various parts of conductive polymers on polymeric substrate PMMA. The morphology and the thickness of layers were sighted using scanning electron microscopy technique (SEM). Finally, the resistance of layers was measured using a four point probe ohmmeter. By increasing the number of layers, the electrical resistance reduced from 2.5 to 1.78 kΩ.

کلیدواژه ها:

polythiophene ، polypyrrole ، poly methyl(meth)acrylate ، conductive polymer ، electrical conductivity