Accession Number : ADA284058

Title :   Thermoelectric Properties of Conducting Polymers

Descriptive Note : Technical rept. Sep 91-Jun 94,

Corporate Author : NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SURVIVABILITY STRUCTURES AND MATERIALS DIRECTORATE

Personal Author(s) : Howell, Barbara

PDF Url : ADA284058

Report Date : JUL 1994

Pagination or Media Count : 41

Abstract : Development of an inexpensive thermoelectric material which has a better cooling capacity than any currently available would have many practical advantages. On board ships or submarines it would allow a quiet, decentralized cooling architecture, it would reduce usage of chlorofluorocarbons, and would provide less expensive and lighter weight cooling systems. To this end a number of organic materials have been obtained and tested for thermoelectric properties. These include conductive vinyl elastomer, conductive nylon 12, and conductive polyphenylene sulfide, all of which are made conductive by addition of carbon. Polymers made conductive in this way do not have a high Seebeck coefficient. other polymers tested include polyaniline, a Schiff's base polymer (poly-N,N'(1,3-phenylenedimethylidyne)bis(3-ethynylaniline)), TTF-TCNQ (tetrathiafulvalinium tetracyanoquinodimethanide) , D sub S(TCNQ)2 (1,2-bis(4-N- methylpyridylium-TCNQ)ethane), and polyoctylthiophene (POT) doped (separately) with 33% of the following substances: iodine, tetraethylamineammonium tetrafluoroborate, potassium persulfate, and ferric chloride. Ferric chloride doped POT was found to have a high Seebeck coefficient (1800 gV/deg C), but the conductivity (0.0074 S/cm) is not high enough to provide a good figure of merit. Polyaniline, Conducting polymer, Conductive vinyl, Conductive nylon, Conductive polyphenylene sulfide, Polyoctylthiophene, Schiff's base, Thermoelectric

Descriptors :   *CONDUCTIVITY, *POLYMERS, *THERMOELECTRICITY, SHIPS, COMPOSITE MATERIALS, ELASTOMERS, COOLING, ORGANIC MATERIALS, ARCHITECTURE, ETHANES, POLYPHENYLENES, VINYL RADICALS, ANILINES, PYRIDINES, QUIET, SULFIDES, SUBMARINES, WEIGHT, COEFFICIENTS, CARBON, NYLON, METHYL RADICALS, MATERIALS

Subject Categories : Organic Chemistry
      Polymer Chemistry
      Electricity and Magnetism
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE