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|Title:||Surface modification and functionalization of electroactive polymer films via grafting of polyelectrolyte, polyampholyte and polymeric acids||Authors:||Kang, E.T.
|Issue Date:||1996||Citation:||Kang, E.T.,Tan, K.L.,Liaw, D.J.,Chiang, H.H. (1996). Surface modification and functionalization of electroactive polymer films via grafting of polyelectrolyte, polyampholyte and polymeric acids. Journal of Materials Science 31 (5) : 1295-1301. ScholarBank@NUS Repository.||Abstract:||Films of electroactive polymers, such as polyaniline (PAN) in its emeraldine base form, and poly(3-alkylthiophene), poly(3-hexylthiophene) (P6TH), poly(3-octylthiophene) (P8TH), and poly(3-dodecylthiophene) (P12TH) can be readily functionalized via thermal or near ultraviolet-light-induced surface graft copolymerization with monomers of polyelectrolyte, polyampholyte and polymeric acids. The monomers used in the present work include dimethyl sulphate quaternized dimethylamino-ethylmethacrylate (DMAEM·C2H6SO4), 3-dimethyl(methacryloyloxyethyl)ammonium propane sulphonate (DMAPS), acrylic acid (AAc) and a sodium salt of styrene sulphonic acid (NaSS). The surface structures and compositions of the electroactive polymer films after functionalization via graft copolymerization were characterized by angle-resolved X-ray photoelectron spectroscopy. Graft copolymerization of poly(3-alkylthiophene) films, but not PAN films, with the hydrophilic monomers readily results in a stratified surface microstructure arising from the migration of the hydrophilic graft chains beneath a thin surface layer which is much richer in the substrate chains. On the other hand, graft copolymerization of PAN films with AAc and NaSS readily gives rise to a self-protonated (and thus conductive) surface structure. © 1995 Chapman & Hall.||Source Title:||Journal of Materials Science||URI:||http://scholarbank.nus.edu.sg/handle/10635/91727||ISSN:||00222461|
|Appears in Collections:||Staff Publications|
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