FUEL 169 |
| Phosphonic acid (PA) containing polymers are promising candidates as solid polymer electrolytes applicable for PEMFC. Among the existence of protogenic acid groups, these materials are able to generate proton transport even in anhydrous state. An essential requirement for fast proton transport is an ordering of the PA in bulk. Therefore novel linear homo- and BAB block copolymers containing PA groups are synthesized. High-molecular well-defined poly(diethyl vinylbenzylphosphonate) (PVBPh) homopolymers are synthesized via atom transfer radical polymerization (ATRP). PVBPh/poly(etheretherketone) BAB block copolymers are obtained by combination of polycondensation and ATRP techniques. For this purpose a telechelic PEEK is converted to difunctional macroinitiators and successfully applied to initiate ATRP of VBPh. The subsequent hydrolysis gives the corresponding PA containing polymers. Both of the systems show high thermal stability and very good film forming properties. The molecular dynamics of the (co)polymers is investigated by solid state NMR. The proton conductivity properties are presented. |
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Fuel Cell Chemistry and Operation
1:35 PM-4:30 PM, Tuesday, 12 September 2006 Palace -- Gold Ballroom, Oral
Sci-Mix
Division of Fuel Chemistry |