Accession Number : ADA346806


Title :   Synthesis and Characterization of Conducting Elastomers Based on Interpenetrated C60-Derived Polymer Networks


Descriptive Note : Final rept. 16 Sep 96-15 Sep 97


Corporate Author : NATIONAL TAIWAN UNIV TAIPEI CENTER FORCONDENSED MATTER SCIENCES


Personal Author(s) : Chiang, Long Y. ; Wang, Lee Y.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA346806


Report Date : 24 FEB 1998


Pagination or Media Count : 31


Abstract : Highly stretchable elastomers embedded with a thin conducting polyaniline layer. A processing technique was demonstrated or the fabrication of interpenetrating conductive polyaniline networks at the near-surface region of fullerenol hypercrosslinked poly (urethane ether) elastomer films. The resulting conductive elastomer film is highly stretchable and exhibits appreciable conductivity in the incorporated, doped polyaniline layer without deteriorating the elasticity and tensile strength of the bulk supporting polymer. Conductive polymers designed by this synthetic method exhibit increased conductivity even upon elastomer elongation by 500% of original length. Hysteresis was observed; however, a high reversibility of the strain-dependent resistivity was evident, thus indicating no further deterioration in the strain-dependent resistance. Also, full compressibility of the conductive C60-PU-PANI elastomer with a nearly constant pressure-dependent resistance was observed from 10 psi to 90 psi. Synthesis of octadecahydroxylated C70. Novel hydrophilic ?70! polymers were synthesized in a reaction involving oxidative sulfation of the C70 molecules induced by H2SO4-SO3. Addition of P2O5 or SeO2 achieved modulation of the sulfation rate til high yield (72%). MALDI-TOF mass spectrum of the ?70! fullerenols indicate octadecahydroxyfullerenes containing 11 hydroxy addends per C70 cage, which correlates the structure of its sulfated precursor as noncyclosulfated ?70! fullerene, C70(SO4)9.


Descriptors :   *SYNTHESIS(CHEMISTRY) , *ELASTOMERS , POLYMERS , FULLERENES , ELECTRICAL CONDUCTIVITY , TAIWAN , SULFATION.


Subject Categories : POLYMER CHEMISTRY
      ELASTOMERS AND RUBBER


Distribution Statement : APPROVED FOR PUBLIC RELEASE