Water-soluble conductive polymers

Details Water-soluble conductive polymers Water-soluble conductive polymers

1989-04-03

1989-11-14

Barr, Josephine

Chemistry: electrical and wave energy

Processes and products

252500, 252518, 524408, 524422, 524404, 524167, 524401, 524415, 526256, 526258, 528490, 528380, C25C 1100, H01B 106

Patent

active

048805084

ABSTRACT:
Polymers which are soluble in water and are electrically conductive. The monomer repeat unit is a thiophene or pyrrole molecule having an alkyl group substituted for the hydrogen atom located in the beta position of the thiophene or pyrrole ring and having a surfactant molecule at the end of the alkyl chain. Polymers of this class having 8 or more carbon atoms in the alkyl chain exhibit liquid crystalline behavior, resulting in high electrical anisotropy. The monomer-to-monomer bonds are located between the carbon atoms which are adjacent to the sulfur or nitrogen atoms. The number of carbon atoms in the alkyl group may vary from 1 to 20 carbon atoms. The surfactant molecule consists of a sulfonate group, or a sulfate group, or a carboxylate group, and hydrogen or an alkali metal. Negative ions from a supporting electrolyte which may be used in the electrochemical synthesis of a polymer may be incorporated into the polymer during the synthesis and serve as a dopant to increase the conductivity.

REFERENCES:
patent: 4691005 (1987-09-01), Sato et al.
patent: 4711742 (1987-12-01), Jen et al.
patent: 4781443 (1988-11-01), Giles
patent: 4818646 (1989-04-01), Takakulo et al.

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