Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/91713
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dc.titleStructural changes associated with thermal and chemical treatment of polythiophenes doped with perchlorate
dc.contributor.authorNeoh, K.G.
dc.contributor.authorKang, E.T.
dc.contributor.authorTan, K.L.
dc.date.accessioned2014-10-09T08:21:20Z
dc.date.available2014-10-09T08:21:20Z
dc.date.issued1991
dc.identifier.citationNeoh, K.G.,Kang, E.T.,Tan, K.L. (1991). Structural changes associated with thermal and chemical treatment of polythiophenes doped with perchlorate. Polymer Degradation and Stability 31 (1) : 37-49. ScholarBank@NUS Repository.
dc.identifier.issn01413910
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/91713
dc.description.abstractElectrically conductive polymers have been synthesized by the reaction of 3-methylthiophene or 2,2′-bithiophene with ferric perchlorate. With copper perchlorate, only 2,2′-bithiophene undergoes simultaneous polymerization and oxidation. Neither ferric perchlorate nor copper perchlorate reacts with thiophene to yield a conducting polymer. X-ray photoelectron spectroscopy of the perchlorate doped polythiophenes indicates that, depending on the perchlorate used, a significant amount of the chlorine may be covalently bonded to the polymer. Treatment of the doped samples with methanol results in the ClO4 - S ratio decreasing to one-third of the pristine value. Treatment with NaOH results in almost complete removal of the ClO4 - anions in poly(bithiophene) synthesized with Fe(ClO4)3. 9H2O. Concurrent with the loss of ClO4 - anions is the decrease in electrical conductivity. The undoped polymer has a high degree of thermal stability while the decomposition of the doped polymer appears to be initiated by the decomposition of the ClO4 - anions. Prolonged heating of the doped samples at 150°C results in the conversion of ClO4 - anions to Cl covalently bonded to the polymer and to volatile species which are lost from the polymer. © 1990.
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentCHEMICAL ENGINEERING
dc.contributor.departmentPHYSICS
dc.description.sourcetitlePolymer Degradation and Stability
dc.description.volume31
dc.description.issue1
dc.description.page37-49
dc.description.codenPDSTD
dc.identifier.isiutNOT_IN_WOS
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