PMSE 272 |
| We have synthesized novel sulfonated block copolyimides with various diamine compositions and block chain lengths by chemical imidization using a two-pot procedure. The proton conductivities of the block copolyimide membranes were measured as functions of the relative humidity and temperature using four-point-probe electrochemical impedance spectroscopy. The proton conductivity of the membrane strongly depended on the block chain lengths and increased with an increase in the block chain lengths. The proton conductivity of NTDA-BDSA-b-6FAP (112/48) as the block copolyimide membrane was approximately 0.35 Scm-1 which indicated a higher value when compared to that determined in NafionŽ. |
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Joint PMSE/POLY Poster Session
6:00 PM-8:00 PM, Tuesday, 12 September 2006 Moscone Center -- Hall D, Poster
Sci-Mix
Division of Polymeric Materials: Science & Engineering |