Study On The Interface Interaction And Polymerization Mechanism Of Coal-based Polyaniline

Interface interaction mechanisms, polymerization mechanisms and dynamics of Coal-based polyaniline (CBP) were studied, which would be used to direct the pilot experiment. The conductivity of Coal-based Polyaniline (PAn) was higher than pure PAn without added proton acid, the results showed that Coal could be used as one kind of organic proton acid dopants. Several model compounds were selected to imitate the interface action between PAn and Coal according to Coal macromolecule structure, the results of conductivity, yield, FTIR, XRD, SEM and pore analysis showed that there were hydrogen bond action, doping and chemical bonding action between Coal and PAn. Phenol-hydroxyl groups, which were avail to doping, could inhibit polymerization; carboxylic groups were avail to polymerizing and doping. However, the bigger the aromatic rings, the weaker of the inhibitation action of phenol-hydroxyl groups, the carboxylic groups could also decrease the inhibitation of phenol-hydroxyl compounds. So the phenol-hydroxyl group of Coal could cooperate with the fused ring and carboxylic group. Study on polymerization process (pH and T changes), structures and properties of Coal-based PAn showed that Coal-based PAn could be synthesized in cation-radical template polymerization controlled by Coal. The polymerization also followed by a self-catalyzing effect and appeared clear chain initiation, chain propagation and chain termination in correspondence with the pH and temperature changes. The polymerization of Absorbed An in the Coal inner surface in monolayer by hydrogen bond and salification action are oriented controlled by Coal which could synthesize long-chain PAn and got good crystallinity. The study on dynamics showed that Coal-based PAn dynamics contained free An dynamics and absorbed An dynamics. During the polymerization, free An polymerization was controlled by the rate of cation radical generation; for the absorbed An in monolayer, the polymerization are controlled by diffusion rate of hydrogen peroxide from the solvent to Coal pores.