| 초록 |
End-group crosslinkable sulfonated poly(arylene ether) polymer was synthesized via direct polymerization of potassium 2,5-dihydroxybenzenesulfonate and decafluorobiphenyl, followed by a reaction with ethynylphenol. The crosslinking reaction of the ethynyl end group of E-SFQK was performed at 250 oC. After crosslinking, proton conductivity, water uptake, and swelling ratio of crosslinked membrane decreased from 0.16 (non-crosslinked membrane) to 0.13 S/cm, from 86% to 42%, and from 31% to 13%, respectively. The effect of crosslinking time on proton conductivity, water uptake, and swelling ratio were also investigated. Methanol permeability of crosslinked membrane was compared with Nafion 117 due to solubility of non-crosslinked membranes in methanol. The crosslinked membrane performed better, with a methanol permeability of 88×10-8 cm2/s, as compared with 154×10-8 cm2/s for Nafion 117. |
