Accession Number : ADA309469

Title :   Conducting Thermoset Polymers.

Descriptive Note : Final rept. 30 Sep 92-29 Sep 95,

Corporate Author : MCDONNELL DOUGLAS AEROSPACE ST LOUIS MO

Personal Author(s) : Brown, I. M. ; Leopold, D. J. ; Sandreczki, T. C.

PDF Url : ADA309469

Report Date : 30 NOV 1995

Pagination or Media Count : 141

Abstract : Efforts to develop electrically conducting thermoset polymers in which the pi-conjugation extends along the backbone and through the crosslink are described. Hot/melt processing of the monomers and oligomers was used to form the thermosets. Three different approaches were used to get the thermoset polymers conducting. The acetylene-terminated Schiff base and acetylene-terminated polythiophene monomers were first cured, then doped with iodine, whereas the acetylene-terminated polyaniline oligomers were first doped with protonic acids then cured. In the third method, an acetylene-terminated Schiff base thermoset was implanted with high energy argon ions using a commercial ion implanter. Electron spin resonance, photoluminescence, and photoabsorption data suggest that polarons can form in the doped and undoped forms of the acetylene-terminated Schiff base and polythiophene thermoset polymers. The spin susceptibilities and electron spin resonance lineshape parameters were measured in these thermosets as a function of iodine content. Two methods to synthesize the acetylene-terminated polyaniline oligomers were investigated. Several substituted derivatives of acetylene-terminated polyaniline were synthesized and doped with different acids such as tosylic acid, benzenedisulfonic acid, duodecylbenzenesulfonic acid, and camphorsulfonic acid. All conductivity values in the thermosets were less than 0.02 Siemens/cm.

Descriptors :   *CONDUCTIVITY, *POLYMERS, *ACETYLENE, *THERMOSETTING PLASTICS, IONS, SYNTHESIS, PROCESSING, HIGH TEMPERATURE, PHOTOLUMINESCENCE, LIGHT, MELTS, ELECTRON SPIN RESONANCE, ELECTRICAL PROPERTIES, HIGH ENERGY, IODINE, MONOMERS, ABSORPTION, ARGON, OLIGOMERS, ANILINES, THIOPHENES.

Subject Categories : Polymer Chemistry
      Organic Chemistry
      Plastics
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE