Accession Number : ADA178227

Title :   Electronics and Ionic Transport in Polymers.

Descriptive Note : Quarterly technical rept. no. 2, 16 Dec 86-15 Mar 87,

Corporate Author : TEXAS UNIV AT ARLINGTON DEPT OF CHEMISTRY

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

PDF Url : ADA178227

Report Date : 15 Mar 1987

Pagination or Media Count : 8

Abstract : Ion transport studies of the 'self-doped' copolymer, poly(pyrrole-co-3-(pyrrol-1-yl)propane sulfonate have shown that lithium mobility is 50% higher than butyl nitride. Polymerizaton of 3-(pyrrol-1-yl) propane sulfonate with ferric chloride has provided a water soluble polymer. A study of anodic polymerization of pyrrole using a quartz crystal microbalance, set up to be used in solution, shows poor polymerization efficiency at the beginning but improves as the reaction proceeds. The band gap of poly(1,2-dithienylethylene) has been measured as 1.77eV. Ion exchange in self-standing films of polypyrrole has been measured with bathing medium composition, pH and counter-diffusing ion charge as variables and the data show good adherence to the Helfferich and Plesset diffusion model. PRDDO calculations on a number of thiophene systems have provided information about HOMO-LUMO gaps, conformations, spin densities in radical cations and ease of polymerizations. Copolymerization of 1,3-cyclohexadiene and 2-chloroacrylonitrile has been shown to give mainly 1,2-polymerization with smaller amounts of 1,4-polymerization. Thermotropic liquid crystalline behavior has been observed in molecules containing square planar Cu(II) metal chelates of bis(2,5-dihydroxybenzaldehyde) ethylenediimine. Two polymers have been prepared from this system, neither of which appears to show liquid crystalline behavior. Keywords: Electronically conducting polymers; Ionically conducting polymers; High energy dielectric polymers; Liquid crystalline Polymers; Polymers; Copolymers.

Descriptors :   *POLYMERS, *IONIC CURRENT, *ELECTRICAL CONDUCTIVITY, POLYMERIZATION, PYRROLES, COPOLYMERS, DIELECTRICS, HIGH ENERGY, ION EXCHANGE, NITRIDES, DIFFUSION, MODELS, CHLORIDES, IRON COMPOUNDS, TRANSPORT PROPERTIES, BUTYL RADICALS, COPPER, CHELATE COMPOUNDS, SPIN STATES, LIQUID CRYSTALS, LITHIUM, MOBILITY, DENSITY, WATER SOLUBLE MATERIALS, POLYMERS, CATIONS, CHEMICAL RADICALS

Subject Categories : Polymer Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE