Synthesis and Properties of New Sulfonated Poly(arylene ether ketone ketone)s for Proton Exchange Membrane Materials
| Autor: | Ya-lin Hsu, 許雅琳 |
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| Rok vydání: | 2007 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 95 Two series of sulfonated poly(aryl ether ether ketone kteone)s (EKs) and sulfonated poly(aryl ether ether ketone kteone ketone)s (EKKs) were synthesized via aromatic nucleophilic substitution polymerization. The sulfonation content (SC) was controlled by the freed ratios of sulfonated and nonsulfonated monomers. The properties of the thermal properties, water uptake, oxidative stability, ion exchange capacity, proton conductivity and methanol permeability of the polymer electrolyte films were fully investigated. The experimental result finds that the water uptake, proton conductivity and methanol permeability of the polymer electrolyte films would increase with increase sulfonation content. The polymer electrolyte films with high sulfonation degree have good water uptake, high proton conductivity and low methanol permeability compared with Nafion 117 and low cost. But the high sulfonated polymer possessed poor stability of oxidation and hydrolysis. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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