Please use this identifier to cite or link to this item:
|Title:||XPS studies of copolymers of pyrrole and N-methylpyrrole||Authors:||Chan, H.S.O.
|Issue Date:||May-1989||Citation:||Chan, H.S.O.,Kang, E.T.,Neoh, K.G.,Tan, K.L.,Tan, B.T.G.,Lim, Y.K. (1989-05). XPS studies of copolymers of pyrrole and N-methylpyrrole. Synthetic Metals 30 (2) : 189-197. ScholarBank@NUS Repository.||Abstract:||A series of copolymers as well as the homopolymers based on pyrrole and N-methylpyrrole have been prepared. These polymers were oxidized with bromine during chemical polymerization. The conductivity results show a decreasing order with increasing proportion of N-methylpyrrole in the copolymer. As most of these polymers are insoluble, XPS was used to examine further the role of the bromine oxidant in terms of the amount incorporated and its interaction with the polymer. The results indicate a direct correlation between conductivity and the amount of positively-charged nitrogen along the polymer chain. Not all the bromine dopants are available for oxidation of the nitrogen because of ring substitution. Around 20 - 23% of the total bromine is incorporated as covalent bromide, regardless of the copolymer composition. There is, however, strong evidence to suggest that a higher bromide ion content is found in the more conducting polymers to account for the more extensive oxidation of the nitrogen. © 1989.||Source Title:||Synthetic Metals||URI:||http://scholarbank.nus.edu.sg/handle/10635/52724||ISSN:||03796779|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Apr 7, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.