| Title | Synthesis of fluorinated polymer electrolyte membranes by radiation grafting and atom transfer radical polymerization techniques |
| Authors | Zhai, Maolin Chen, Jinhua Hasegawa, Shin Maekawa, Yasunari |
| Affiliation | Peking Univ, Coll Chem & Mol Engn, Dept Appl Chem, BNLMS, Beijing 100871, Peoples R China. Japan Atom Energy Agcy, Quantum Seam Sci Directorate, Environm & Ind Mat Res Div, Conducting Polymer Mat Grp, Takasaki, Gumma 3701292, Japan. Peking Univ, Coll Chem & Mol Engn, Dept Appl Chem, BNLMS, Yiheyuan Rd 5, Beijing 100871, Peoples R China. |
| Keywords | Radiation grafting Atom transfer radical polymerization Fluorinated polymer electrolyte membrane PROTON-EXCHANGE MEMBRANES METHANOL FUEL-CELLS THERMAL-DEGRADATION ETFE FILMS STYRENE FLUOROPOLYMERS ETHER COPOLYMERIZATION KINETICS MONOMERS |
| Issue Date | 2009 |
| Publisher | polymer |
| Citation | POLYMER.2009,50,(5),1159-1165. |
| Abstract | A novel polymer electrolyte membrane was synthesized by radiation-induced grafting and consequent atom transfer radical polymerization (ATRP). First, bromine-containing perfluorinated grafts were prepared by radiation grafting of 2-brotnotetrafluoroethyl trifluorovinyl ether (BrTFF) into a poly(ethylene co-tetrafluoroethylene) (ETFE) film. Then, the bromine atoms in the ETPE-g-PBrTFF grafted films were acted as initiators, and the films were treated with Cu(1)-based catalytic system of a CuBr and 2,2'-bipyridyl (bpy) for the ATRP. By adjusting the molar ratio of initiator/CuBr/bpy and the reaction temperature, branched poly(styrene) with a grafting yield of above 1001 on the poly(BrTFF) main chains was constructed in ETFE-g-PBrTFF films. Thermal analysis revealed that the perfluorinated poly(BrTFF) main chains were miscible to ETFE, whereas the hydrocarbon poly(styrene) branches were phase-separated froth the ETFE-g-PBrTFF film. Sulfonic groups could be further introduced into the polystyrene) grafts of ETFE-g-PBrTFF-g-PS films with homogeneous distribution in a perpendicular direction to the membrane surface. The resulting membrane with a styrene grafting yield of 1595 exhibited higher proton conductivity than commercial Nafion 117 membrane. Likewise, it had better chemical stability than ETFE-g-PSSA membrane prepared by conventional radiation-induced grafting. (c) 2009 Elsevier Ltd. All rights reserved. |
| URI | http://hdl.handle.net/20.500.11897/151342 |
| ISSN | 0032-3861 |
| DOI | 10.1016/j.polymer.2009.01.014 |
| Indexed | SCI(E) |
| Appears in Collections: | å å¦ä¸ å å å·¥ç¨ å¦é ¢ |
