PAQR polymers

The e. s. r. and conductivity of polymers such as the polyacene/qui-none radical polymers (PAQR polymers), polyacetylenes and polybenzimidazoles have been investigated (59, 60, 61). The term eka conjugated has been coined to decribe their properties which are very similar to those previously described. The e. s. r. signal is without structure, the activation energy which ranges from 0.2—2.0 ev is considerably... 

Another class of thermally stable materials with electroactivity are polyacene quinone radical (PAQR) polymers. The thermal stability of PAQR polymers was. studied up to 1200°C under helium. The electrical conductivity was found to go through a minimum at about 500"C, showing that the original synthetic structure of a PAQR polymer is unique and thermally sensitive and that the negative temperature dependence of e.c. makes it similar to degenerate semi-metals [237]. 

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