| 초록 |
Sulfonated poly ether ether ketone with various degree of sulfonation (40% ~ 80%) was prepared by homogeneous and heterogeneous method. SAXS was used to study the different morphology between two methods. Evidence of sulfonation and sulfonated degrees were determined by FTIR, XPS and back titration. Thermal properties showed that enhancing degree of sulfonation might increase the glass temperature and the weight loss. Membrane preparation with solvents such as: DMF, DMAC and NMP influences on values of water uptake, ion conductivity, methanol permeability and mechanical properties. At room temperature, sample of 68% sulfonated degree attained ion conductivity higher and methanol permeability lower than Nafion 117 while the tensile strength at water content equilibrium state seems equal. |
