Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/67557
Title: Structural and mechanical degradation of polypyrrole films due to aqueous media and heat treatment and the subsequent redoping characteristics
Authors: Neoh, K.G. 
Young, T.T.
Kang, E.T. 
Tan, K.L. 
Keywords: Anion mobility
Mechanical properties
Polypyrrole
Redoping
Stability
Issue Date: 18-Apr-1997
Source: Neoh, K.G.,Young, T.T.,Kang, E.T.,Tan, K.L. (1997-04-18). Structural and mechanical degradation of polypyrrole films due to aqueous media and heat treatment and the subsequent redoping characteristics. Journal of Applied Polymer Science 64 (3) : 519-526. ScholarBank@NUS Repository.
Abstract: Polypyrrole films doped with p-toluenesulfonate and poly(4-styrenesulfonate) anions were synthesized electrochemically. These films were treated with water and dilute NaOH solution for varying periods of time. The films do not lose the anions readily when treated with water. In NaOH, dedoping occurs rapidly, either via migration of the tolneneeulfonate anions out of the film or the neutralization of the poly(4-styrenesulfonate) anions. The undoped polypyrrole is very susceptible to ring oxidation resulting in C-O and C=O group. Severe deterioration of the mechanical properties of the film also results upon prolonged exposure to NaOH. The effects of heat on the polypyrrole doping level, structure, and mechanical properties were investigated. The results from redoping experiments suggest that unless the dedoping process by NaOH is carried out rapidly, the redoped films will have significantly lower doping levels and conductivities than the pristine films © 1997 John Wiley & Sons, Inc.
Source Title: Journal of Applied Polymer Science
URI: http://scholarbank.nus.edu.sg/handle/10635/67557
ISSN: 00218995
Appears in Collections:Staff Publications

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