화학공학소재연구정보센터
Journal of Electroanalytical Chemistry, Vol.426, No.1-2, 97-102, 1997
Effect of Electropolymerization Temperature on Structural, Morphological and Conductive Properties of Poly(Aniline) Deposits Prepared in 1,2-Dichloroethane Without a Proton Donor
Electropolymerization of aniline was carried out in a non-aqueous solution of 1,2-dichloroethane (DCE) without protic acid at temperatures ranging from 248 to 298K. The resulting poly(aniline) deposit on the electrode showed higher conductivity with decreasing electropolymerization temperature. The polymer prepared at higher temperatures had higher molar mass, which was expected to be effective for intrachain conductivity. However, this was not the case with the branched structure and/or discontinuity of the pi-conjugated system found by FT-IR and NIR measurements. On the contrary, a morphological difference in the deposit was clearly found on varying the electropolymerization temperature. This difference resulted from the initial stage of the polymer deposition on the electrode, concerned with nucleation. The difference in conductivity for the poly(aniline) deposit with varying electropolymerization temperature is discussed in terms of the polymer chain structure and the morphology of the deposit.