Microwave properties of EPDM/PAni-DBSA blends

Conductive elastomer blends of ethylene-propylene-diene rubber, EPDM, and p olyaniline, PAni, doped with dodecylbenzene sulfonic acid, DBSA, were prepa red and evaluated as a radar absorbing material, RAM. Reflectivity measurem ents in the 8-12 GHz frequency range, using the NRL arch method, were done to evaluate the shielding effectivity. The results showed that the dopant a nd PAni concentrations and also the sample thickness affect these measureme nts. Good shielding values were obtained (similar to 15 dB) with the 50/50, 40/60 and 20/80 (w/w %) EPDM/PAni blends.