Investigations into the Polyaniline and Polypyrrole Families of Conducting Polymers for Application as Radar Absorbing Materials

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Authors
  1. Huber, T.
  2. Saville, P.
  3. Edwards, D.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);Victoria Univ, Victoria BC (CAN)
Abstract
The synthesis and characterization of two families of conducting polymers, namely polyaniline and polypyrrole, were investigated in order to ascertain their viability as radar absorbing materials (RAM). A large number of polyanilines (including derivatives and copolymers) were synthesized by chemical oxidative polymerization, while the polypyrroles were produced by electrochemical oxidation. The syntheses were performed under varying reaction conditions (variable temperature, time, dopant, oxidant/monomer ratio) to investigate the effects of the synthetic parameters on the conductivity and permittivity of the resulting polymers. The conductivity of the polymers was measured during the four point probe method at ambient temperature. In the case of polyaniline, the samples were either pressed pellets of the bulk polymer or polyaniline/acrylic composites, whereas the polypyrrole samples were in the form of thin films. The complex permittivity of the polymers was determined from the reflection parameters measured across the X-band (8 - 12 GHz) in the microwave region of the electromagnetic spectrum. The data indicate that the synthetic parameters investigated, do indeed have an effect on the morphology of the polymers, and thus on the conductivity and permittivity.

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Keywords
Conducting polymers;Microwave properties;Polyaniline;Polypyrroles;RAM;Radar absorbing materials;Radar signatures;Permittivity
Report Number
DRDC-ATLANTIC-TM-2003-005 — Technical Memorandum
Date of publication
01 Jan 2003
Number of Pages
34
DSTKIM No
CA023211
CANDIS No
520449
Format(s):
CD ROM

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