Please use this identifier to cite or link to this item:
|Title:||The protonation-deprotonation hysteresis in polyaniline||Authors:||Kang, E.T.
|Issue Date:||Mar-1996||Citation:||Kang, 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||Abstract:||The 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.||Source Title:||Polymer||URI:||http://scholarbank.nus.edu.sg/handle/10635/91765||ISSN:||00323861||DOI:||10.1016/0032-3861(96)87274-0|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Apr 8, 2020
WEB OF SCIENCETM
checked on Mar 16, 2020
checked on Mar 29, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.