Pyridine-Based Aromatic Polyethers

Pyridine based aromatic polyethers are novel polymer structures that contain polar pyridine groups as main chain linkage in... 

Papadimitriou KD, Geormezi M, Neophytides SG et al (2013) Covalent cross-linking in phosphoric acid of pyridine based aromatic polyethers bearing side double bonds for use in high temperature polymer electrolyte membrane fuel cells. J Membr Sci 433 1-9... 

In a subsequent approach bulky but not interacting with the H3PO4 substituents were chosen for the preparation of polymer electrolytes keeping the well-established pyridine-based aromatic polyether sulfone backbone [20]. In particular, phenyl and tolyl side moieties were introduced. Copolymer X and XI, respectively, since their size is expected to increase the free volume among neighboring polymeric chains in the bulk leading to an enhancement of the copolymers doping ability without the plasticization phenomena of the previously pyridine-substituted copolymers. 

Pyridine based aromatic polyether/ phosphoric acid Improves membranes mechanical strength at high temperatures Fuel cell [142]... 

Kallitsis, ).K., Geormezi, M., and Neophytides, S. (2009) Polymer electrolyte membranes for high-temperature fuel cells based on aromatic polyethers bearing pyridine units. Polym. Int., 58, 1226-1233. 

Geormezi M, Chochos CL, Gourdoupi N, Neophytides SG, Kallitsis JK (2011) High performance polymer electrolytes based on main and side chain pyridine aromatic polyethers for high and medium temperature proton exchange membrane fuel cells. J Power Sources 196(22) 9382-9390... 

Pefkianakis, E. K. Morfopoulou, C. Deimede, V. Kallitsis, J. K., Blends of aromatic polyethers bearing polar pyridine units and their evalnation as high temperature polymer electrolytes, Macromol. Sympos., 219(1), 183-190 (2009). Deng, S. Mays, J. W. Hassan, M. K. Mauritz, K. A., Low cost high temperature fuel cell membranes based on poly(l,3-cyclohexadiene) homopolymers, polymer blends, and block copolymers, the 238th ACS National Meeting, ACS Division of Fuel Chemistry, Washington, DC, 16-20.08.2009. 

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