Thin film of poly(hexafluoropropylene-co-tetrafluoroethylene) (FEP) reacted with triethylamine (TEA) upon UV irradiation to give hydrophilic and oleophilic surface through complicated defluorination reactions such as introduction of diethylaminoethyl group and formation of unsaturated bonds. Solvent and additive effects on the photoreaction strongly suggested the involvement of an electron transfer process from TEA to FEP.
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Ichinose et al. (1995) studied this question.
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