| 초록 |
Conducting polymer is a popular basic material for a number of applications such as antistatic coatings, electrochromic displays, polymer light-emitting diodes, and sensors. Of the numerous electrically conducting polymers that have been studied and developed over the past 25 years, poly(3,4-ethylenedioxythiophene) (PEDOT) has appeared to be one of the most promising conducting polymers due to its high environmental stability, low band gap, high conductivity, and excellent transparency in the doped state. However, PEDOT has the intrinsic disadvantage such as insolubility in water and organic solvents. To overcome this problem, a new water-soluble PEDOT is synthesized in this study. 3-(4-vinylbenzyloxyethyl)-thiophene is synthesized as a grafting site of EDOT. The poly(sodiumstyrenesulfonate-co-3-(4-vinylbenzyloxyethyl)-thiophene) (P(SSNa-co-VOT)) precursor is synthesized by free radical polymerization. EDOT monomer is grafted onto the P(SSNa-co-VOT) precursor by chemical oxidative polymerization. The final product is poly(styrenesulfonic acid-g-3,4-ethylenedioxythiophene (PSSA-g-PEDOT) which shows water-solubility due to sulfonic acid groups and self-doped properties by the polymeric dopant, backbone PSSA. The electrical conductivity of the conducting graft copolymer is measured.
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