Sulfonated copolymers studied in laboratory phase separate to form a nano-scale hydrophilic and hydrophobic domain morphology. The hydrophilic phase wherein the sulfonic acid moieties reside absorbs water. Water confined in hydrophilic pores in concert with the sulfonic acid groups serve the critical function of proton (ion) conduction in these systems. A study on the states of water-polymer interactions and transport phenomenon in proton exchange membranes was carried out. The state of water in the copolymers was quantified and characterized. Self diffusion coefficients of water in a variety of copolymers were also determined. The dispersion in melting point indicated interaction between the loosely bound water and the copolymer. Self diffusion coefficient was related to the different states of water. This is an abstract of a paper presented ACS Fuel Chemistry Meeting (Washington, DC Fall 2005).
|Original language||English (US)|
|Number of pages||2|
|Journal||ACS Division of Fuel Chemistry, Preprints|
|State||Published - Dec 1 2005|
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