Accession Number : ADA261401


Title :   Electrical Conductivity of Ion Implanted Ladder and Semi-Ladder Polymers.


Descriptive Note : Final rept. 1 Sep 1990-31 Oct 1991,


Corporate Author : OHIO STATE UNIV COLUMBUS


Personal Author(s) : Epstein, Arthur J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a261401.pdf


Report Date : Oct 1992


Pagination or Media Count : 35


Abstract : Aromatic heterocyclic ordered rigid rod, ladder and semi-ladder polymers (including BBL, PBO, and BBB) combine exceptional high temperatures stability with excellent mechanical properties as well as environmental stability. We have carried out systemic coordinated investigation of the morphological, chemical, optical and electrical properties of ion implanted rigid rod, ladder and semi-ladder polymers, XPS data of films reveal significant reduction in the heteroatoms. An increase carbon content after implantation together with the scanning electron microscopy and Raman studies indicate that the implanted material is no longer polymeric but perhaps better described as a carbon network, The implanted polymers have a featureless broad optical absorption from the infrared to the UV. They have a very weakly temperature- dependent conductivity (typically -100 S/cm at room temperature). The initial conductivity, thermoelectric power and magnetotransport studies suggest that these implanted polymers behave as disordered metals. Further studies on are necessary to elucidate the role of implant ion beam energy and current as well as to determine the microscopic charge conduction mechanism.


Descriptors :   *ION IMPLANTATION , SCANNING , IONS , METALS , OPTICS , TEMPERATURE , MECHANICAL PROPERTIES , STABILITY , NETWORKS , CHEMICALS , MATERIALS , POLYMERS , HIGH TEMPERATURE , ENERGY , FILMS , ION BEAMS , CARBON , ELECTRICAL PROPERTIES , RIGIDITY , ABSORPTION , RODS , AROMATIC COMPOUNDS , POWER , ELECTRON MICROSCOPY , REDUCTION , MICROSCOPY , ROOM TEMPERATURE , ELECTRICAL CONDUCTIVITY


Subject Categories : Polymer Chemistry
      Electricity and Magnetism
      Particle Accelerators
      Solid State Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE