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| - Consecutive Graft Copolymerization of GlycidylMethacrylate and Aniline on Poly(Tetrafluoroethylene)Films
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| - Chemical modification of Ar plasma-pretreated poly(tetrafluoroethylene) (PTFE) film by UV-inducedgraft copolymerization with glycidyl methacrylate (GMA), followed by oxidative graft copolymerization ofaniline and reactive immobilization of polyaniline (PANI) chains have been carried out to render the PTFEsurface conductive. The surface compositions and microstructures of the graft-copolymerized PTFE filmswere studied by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM), respectively.The PANI chains grafted onto PTFE film surface were similar to the PANI homopolymer. The surfaceresistance of the aniline graft-copolymerized PTFE film could be reduced to the order of about 104 Ω/sq,compared to the order of 1016 Ω/sq for the pristine PTFE film. Cohesive failure occurred inside the bulkof PTFE film when an epoxy adhesive was applied to peel off the grafted PANI layer from the GMAgraft-copolymerized PTFE substrate. The strong adhesion arose from the fact that the PANI chains werecovalently bonded onto the GMA graft-copolymeried PTFE film through the curing of epoxide groups ofthe grafted GMA polymer by the amine groups of the aniline molecules during oxidative graftcopolymerization and the amine groups of PANI after the oxidative polymerization of aniline.
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