Study On The Preparation And Conductivity Of PAn(PPy)/EG Conductive Composite

A series of conductive polymers such as polyaniline (PAn) and polypyrrole (PPy) are the most investigated conductive polymers because they have higher conductivity, a good stability in the air and they can be prepared easily. But the special chain structure leads to poor processibility, which limits their more widespread application.First, in this dissertation conductive PAn is prepared, using situ-doped emulsion polymerization. Through studying the influence of the amount of dodecylbenzene sulfuric acid (DBSA) and the amount of oxidant, reaction temperature, and reaction time on the conductivity of polyaniline, the optimized conditions have been obtained. In this optimized conditions PAn/Expanded graphite (EG) composite is prepared, using situ-doped emulsion polymerization under ultrasonic condition. Have studied the influence of ultrasonic condition, the expanded volume of EG, the amount of EG and the amount of HC1 under co-doped polymerization on the conductivity of PAn/EG composite. The component structure and properties of PAn/EG composite were characterization by X-Ray diffraction, FT-IR, and SEM.At the same time, PPy/EG composite is prepared using ultrasonic situ- polymerization in water. The prepared conditions are optimized and the influence of he prepared conditions on the conductivity of PPy/EG are studied. The optimized conditions have ultrasonic condition, the expanded volume of EG, the amount of EG,reaction temperature, reaction time, the amount of oxidant, ultrasonic time. The component structure and properties of PPy/EG composite were characterization by X-Ray diffraction, FT-IR, and SEM.