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|Title:||Novel heteroarylene polyazomethines: Their syntheses and characterizations||Authors:||Ng, S.C.
|Issue Date:||Sep-1998||Citation:||Ng, S.C.,Chan, H.S.O.,Wong, P.M.L.,Tan, K.L.,Tan, B.T.G. (1998-09). Novel heteroarylene polyazomethines: Their syntheses and characterizations. Polymer 39 (20) : 4963-4968. ScholarBank@NUS Repository.||Abstract:||Novel thiophene or furan-containing polyazomethines were synthesized by chemical oxidative polymerization with ferric(III) chloride. The structures of the undoped and doped polymers were evaluated by FTir., elemental analysis, u.v.-vis spectrometry, X-ray photoelectron spectroscopy (XPS) and their thermal stability determined using thermogravimetric analysis (t.g.a.). The conductivities of the undoped polymers were less than 10-8 S cm-1, while those of the doped ones were in the range of 10-7 to 10-6 S cm-1. The low conductivity values were attributed to the low degree of conjugation in the polymers caused by non-planarity of the polymer chains. The thiophene-containing polymers underwent sulfur extrusion during polymerization, resulting in an interruption of conjugation in the polymer backbone with consequent diminished electrical conductivity. © 1998 Elsevier Science Ltd. All rights reserved.||Source Title:||Polymer||URI:||http://scholarbank.nus.edu.sg/handle/10635/94382||ISSN:||00323861|
|Appears in Collections:||Staff Publications|
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