Accession Number : ADA234597


Title :   Electronic and Ionic Transport in Processable Conducting Polymers


Descriptive Note : Technical rept.


Corporate Author : TEXAS UNIV AT ARLINGTON CENTER FOR ADVANCED POLYMER RESEARCH


Personal Author(s) : Pomerantz, Martin ; Reynolds, John R. ; Rajeshwar, Krishnan ; Marynick, Dennis S.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA234597


Report Date : 12 APR 1991


Pagination or Media Count : 6


Abstract : A series of poly 1,4-BIS(2-FURANYL)-2.5-disubstituted-p-phenylenes has been prepared electrochemically. They exhibit conductivities of up to 0.1 S/ cm when doped electrochemically. The nature of the substituent has been shown to affect the cyclic voltammetric E(1/2) potentials and bandgaps, but these are independent of the length of the alkyl chain in the substituents. Interestingly, electrogravimetric analysis has shown greater mass increase upon electrochemical oxidation with longer alkoxy chains. Poly (P-phenyleneterephthalamido) Propane sulfonate (PPTA PS) has been prepared and studied extensively. The ternary phase behavior of poly(p-phenylene benzobisthiazole)/-PPTA-PS/methane sulfonic acid has been examined, and the intermolecular coil/rod interactions have been shown to cause the phase behavior to deviate from Flory's theory for molecular composites. The mechanistic aspects of the chemical reduction of polypyrrole naphthalene sulfonate thin films by hydrazine have been elucidated. The self exidation of polypyrrole in N2 and O2, and the involvement of polaron and bipolaron states, has been studied by UV-visible spectroelectrochemistry. Conformational analyses and electronic structures have been calculated for a variety of systems including copolymers of heterocyclic rings (e.g., furan and pyrrole) and disubstituted (methyl or methoxy)-p-phenylene systems, copolymers of heterocyclic rings and dimethoxyvinylene and a thienothiophene system.


Descriptors :   *IONS , HYDRAZINES , INTERACTIONS , CHEMICALS , MOLECULES , STRUCTURAL PROPERTIES , POLYMERS , COMPOSITE MATERIALS , ELECTRON TRANSPORT , ELECTRONIC EQUIPMENT , COPOLYMERS , ELECTROCHEMISTRY , PHASE STUDIES , REDUCTION , TRANSPORT PROPERTIES , OXIDATION , CHAINS , PYRROLES , SULFONATES , MOLECULE MOLECULE INTERACTIONS , BEHAVIOR , RODS , RINGS , TERNARY COMPOUNDS , FURANS , PROPANE , ALKYL RADICALS , HETEROCYCLIC COMPOUNDS , ALKOXY RADICALS , COILS


Subject Categories : ORGANIC CHEMISTRY


Distribution Statement : APPROVED FOR PUBLIC RELEASE