Electrically active polymers synthesis

The discovery that doped forms of polypyrroles conduct electrical current has spurred a great deal of synthetic activity related to polypyrroles [216-218], Reviews are available on various aspects of the synthesis and properties of polypyrroles [219,220]. In addition, summaries of important aspects of polypyrroles are included in several reviews on electrically conducting polymers [221-226]. Polypyrrole has been synthesized by chemical polymerization in solution [227-231], chemical vapor deposition (CVD) [232,233], and electrochemical polymerization [234-240]. The polymer structure consists primarily of units derived from the coupling of the pyrrole monomer at the 2,5-positions [Eq. (84)]. However, up to a third of the pyrrole rings in electrochemically prepared polypyrrole are not coupled in this manner [241]. 

PBBs may be used as starting materials in the synthesis of biphenyl esters, in a modified WUrtz synthesis and as color activators in sensitizers also, to control the molecular weights of polymers, e.g., in polybutadienes. Other possible uses include wood preservation and as voltage stabilizers in electrical insulation (ref. 80, p. 438). 

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