Polypyrrole Stability and Coatings for Radar Absorbing Materials

摘要

Resistive materials absorb microwaves by converting the induced current into heat. Polypyrrole is an electrically conducting polymer that has the potential to be used as a radar absorbing material. The long-term electrical stability of polypyrrole and its composites will determine its utility for advanced applications. This paper describes the formulation of coating materials containing polypyrrole synthesized with different counter ions. Observations of the electrical and permittivity stability of the powders and coatings are presented as a function of time. The results show that embedding the conductive material in a matrix stabilises the properties. The results also highlight the challenges that will be faced in reproducibly formulating a coating with consistent properties.