Studies on the Preparation of Conducting Composite Film by a Vapor Phase in situ Polymerization

전도성 복합필름의 기상중합과 특성에 대한 연구

  • Park, Jun-Seo (Department of Chemical Engineering, Hankyong National University) ;
  • Park, Jang-Woo (Department of Food Science & Engineering, Hankyong National University)
  • Received : 1999.06.21
  • Accepted : 1999.09.03
  • Published : 1999.10.10

Abstract

Electrically conducting composite films were prepared by a vapor phase in situ polymerization of pyrrole in the methyl cellulose film containing a copper(II) perchlorate. Methylcellulose had high affinity to pyrrole and was used as a matrix polymer. Conducting polypyrrole was embedded in the methylcellulose film forming a conducting network and the conductivity of the composite films ranged $10^{-1}$ to $10^{-7}S/cm$. The conductivities of conducting composite films were dependent on the nature of the matrix polymers, concentration of oxidant and polymerization time. In situ polymerization of pyrrole was observed in the matrix polymer and confirmed by UV-vis spectra. From the results of the thermogravimetric analysis, the chemical oxidative polymerization of pyrrole in the matrix polymers did not give any negative effects on the thermal stability of the composite films. Electron micrograph of composites indicated good penetration of PPy in the matrix polymer. DMA suggested a certain degree of incompatibility of the polypyrrole in the composites.

Keywords

polypyrrole;conducting composite film;conductivity;in situ polymerization

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