Please use this identifier to cite or link to this item: https://doi.org/10.1016/0032-3861(96)87274-0
DC FieldValue
dc.titleThe protonation-deprotonation hysteresis in polyaniline
dc.contributor.authorKang, E.T.
dc.contributor.authorNeoh, K.G.
dc.contributor.authorTan, K.L.
dc.date.accessioned2014-10-09T08:22:00Z
dc.date.available2014-10-09T08:22:00Z
dc.date.issued1996-03
dc.identifier.citationKang, E.T., Neoh, K.G., Tan, K.L. (1996-03). The protonation-deprotonation hysteresis in polyaniline. Polymer 37 (6) : 925-929. ScholarBank@NUS Repository. https://doi.org/10.1016/0032-3861(96)87274-0
dc.identifier.issn00323861
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/91765
dc.description.abstractThe changes in intrinsic oxidation state ([-N-] and [-NH-] content) and protonation level ([N+]/[N] ratio) of emeraldine (EM) base powders as a function of protonic acid loadings resulting from the protonation-deprotonation cycle have been assessed quantitatively by X-ray photoelectron spectroscopy. A hysteresis effect was observed for the protonation-deprotonation cycle involving HCl, but not for H2SO4. The hysteresis has been attributed in part to covalent HCl addition to the polymer and the associated reduction in intrinsic oxidation state. A hysteresis effect involving a significant increase in intrinsic oxidation state was observed in the once acid-base cycled EM films cast from N-methylpyrrolidinone, but not for powders. The phenomenon has been attributed to the more efficient hydrolysis of powder samples in aqueous acid media due to the large effective surface area.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/0032-3861(96)87274-0
dc.sourceScopus
dc.subjectHysteresis
dc.subjectPolyaniline
dc.subjectProtonation-deprotonation
dc.typeArticle
dc.contributor.departmentCHEMICAL ENGINEERING
dc.contributor.departmentPHYSICS
dc.description.doi10.1016/0032-3861(96)87274-0
dc.description.sourcetitlePolymer
dc.description.volume37
dc.description.issue6
dc.description.page925-929
dc.description.codenPOLMA
dc.identifier.isiutA1996UB86100005
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