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|Title:||Stability studies of polyaniline|
|Authors:||Neoh, K.G. |
|Source:||Neoh, K.G.,Kang, E.T.,Khor, S.H.,Tan, K.L. (1990). Stability studies of polyaniline. Polymer Degradation and Stability 27 (1) : 107-117. ScholarBank@NUS Repository.|
|Abstract:||The stability of conductive polyaniline has been assessed at elevated temperatures, under high current density and in organic solvents. A decrease in electrical conductivity (ρ) occurs when the protonated polyaniline is subjected to temperatures above 60°C. However, at temperatures below 100°C, the decrease in ρ is reversible. The polymer can sustain a current density of 2A/cm2 over a 24 h period with no adverse effect but breaks down rapidly with a current density over 10A/cm2. Although the protonated polyaniline shows very limited solubility in organic solvents, its electrical conductivity can be significantly affected by the solvent. X-ray photoelectron spectroscopy results support the postulate that the degradation of protonated polyaniline in solvents is due to the loss of chlorine anions and/or the conversion of some of the anions to covalently bonded chlorine. Polyaniline-tetracyanoethylene complex appears to have better electrical stability than the conventional protonated polyaniline. © 1989.|
|Source Title:||Polymer Degradation and Stability|
|Appears in Collections:||Staff Publications|
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