Electrical and Environmental Studies of Conduction Polymers.
Final rept. 14 Sep 84-14 Oct 85,
GTE LABS INC WALTHAM MA
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The objective of this research was to present a clear and defined strategy toward the synthesis of environmentally stable conducting polymers, paying particular attention to the influence of the dopant on the electrical conductivity, environmental stability, and the dielectric properties. This involves a fundamental understanding of the molecular basis for the electrical properties and the interaction of the dopant with the polymer backbone. On the basis of an investigation into the kinetics of the degradation of electrical conductivity in two conducting polymer system was identified which is thermally stable in an inert atmosphere and whose degradation of conductivity when exposed to air follows first order kinetics. Specific examples are polypyrroletoluene sulfonate and multicomponent system comprising polypyrrole, toluene sulfonate, and a processible polymeric component. The capability to predict adequately the environment stability of a conducting polymer on the basis of a kinetic treatment of accelerated life tets was also demonstraed for the first time. Another conducting polymer system, namely multicomponent polythiophenepoly THF was found to be less stable with respect to polyprrole and it follows a multi-order degradation process in laboratory air. The dielectric properties of the above materials were investigated over the frequency rate from 1-100 GHZ.
- Electricity and Magnetism