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PVC As Photodonor Of HCl For Protonation Of Polyaniline
Published 1998 · Chemistry
Abstract A novel photoinduced protonation of PANI(EB) from PVC as donor of HCl is proposed. The polymer-composite is a Polyvinylchloride (PVC) blended with the base form of polyaniline called emeraldine base (EB). The UV-induced protonation of the polymer chain is studied through its optical absorption. The protonation of EB occurs through HCl diffusion within the polymer chains in the PANI(EB)/PVC composite. After UV-exposure, the PANI(EB)/PVC-composite turns to green-color, which is typical of the emeraldine salt (ES). Contrary to film prepared from THF, a negative coloration is obtained with blends prepared from N -methylpyrrolidinone (NMP). Origin could be a proton-trapping effect from solvent traces behaving as usual PVC additives.