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Electrochemical stability and transformations of fluorinated poly(2,6-dimethyl-1,4-phenylene oxide) |
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| Authors: | A A Pud S P Rogalsky G S Shapoval A P Kharitonov A Kemperman |
| Institution: | a Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Sciences of Ukraine, 50 Kharkovskoye Shosse, Kiev 02160, Ukraine b Institute of Energy Problems of Chemical Physics (Division) of the RAS, Chernogolovka, Moskow Region 142432, Russia c University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands |
| Abstract: | Fluorination of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) leads to narrowing of its window of electrochemical stability in a cathodic range of potentials. It is found this is connected with appearance of both perfluorinated and incompletely fluorinated units in the polymer. The former units are liable to electrochemical reduction (at potentials <−2.0 V) followed by elimination of fluorine anions and the latter react with basic products (generated at potentials <−1.8 V) of electrochemical reduction of the background solution. In the both cases this results in appearance of conjugated multiple bonds in the fluorinated macromolecules. Quantities of these units in fluorinated PPO were determined with a help of direct and indirect electrochemical reductive degradation techniques. |
| Keywords: | Fluorinated poly(2 6-dimethyl-1 4-phenylene oxide) Electrochemical properties Electrochemical transformations Degradation Stability |
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