Accession Number : ADA188456

Title :   Morphological Studies of Conductive Polymers.

Descriptive Note : Final rept. 23 Sep 85-24 Apr 87,

Corporate Author : ROCKWELL INTERNATIONAL THOUSAND OAKS CA SCIENCE CENTER

Personal Author(s) : Walker, J ; Buckley, L J

PDF Url : ADA188456

Report Date : 31 May 1987

Pagination or Media Count : 62

Abstract : A series of free-standing films of doped polypyrrole were prepared and characterized by x ray and electron diffraction methods. The degree of order observed in these films was found to be dependent upon the incorporated dopant anions and polymer synthesis conditions. Thus, the benzenesulfonate monoanions and the long chain alkyl sulfates were found to promote the formation of the highest order polypyrrole films. Transmission Electron Microscope (TEM) observation of these polymers confirmed that the most ordered polymers contained a greater degree of crystallinity that the least ordered polymers. A cyclic voltammetric technique for assessing the order in thin polypyrrole films is described. Other conducting polymers were also characterized by diffraction techniques. Thus, polypyrrole prepared by the ferric ion oxidation of pyrrole monomer, was much less ordered than the corresponding electrodeposited polymers. X-ray and electron diffraction techniques were employed to evaluate the morphology of doped poly-3-methylthiophene. The 3-methyl substituent apparently renders the lattice of this polymer more ordered and less flexible than the corresponding polypyrrole structure.

Descriptors :   *CONDUCTIVITY, *MORPHOLOGY, *POLYMERS, *PYRROLES, ALKYL RADICALS, ANIONS, CHAINS, CRYSTALS, DIFFRACTION, ELECTRODEPOSITION, ELECTRON DIFFRACTION, FILMS, IONS, IRON COMPOUNDS, MONOMERS, ORDER DISORDER TRANSFORMATIONS, OXIDATION, SULFATES, SYNTHESIS(CHEMISTRY), THIN FILMS, X RAYS

Subject Categories : Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE