Effect of Polymeric Chain Flexibility on Electrical Conductivity of Aromatic Polyesters

Two types of aromatic polyesters were prepared by polycondensation of terephthaloyl dichloride with 2,7-dihydroxy naphthalene (polymer 1) and bis(4,4-di--naphthoyl) methane (polymer 2). The electrical conductivity of polymer 2 is larger than that of polymer 1. The reason is the polymers chain mobility. The effect of doping by ferric chloride and temperature on electrical conductivity was studied. It was noticed that the doping process increased the conductivity of polymer 1 more than polymer 2. The temperature well increase the electrical conductivity of purred polymer in a manner that the activation energy of polymer 2 is larger than that of polymer 1.