Preparation of polypseudorotaxane composed of linear and cyclic polyethylene oxides and its application to solid polymer electrolyte |
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| Authors: | Ryuji Watanabe Masashi Noba Takahiro Uno Takahito Itoh Masataka Kubo |
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| Affiliation: | 1. Division of Advanced Integration Engineering, Graduate School of Regional Innovation Studies, Mie University, Tsu, Mie, Japan;2. Division of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie, Japan |
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| Abstract: | The mixture of linear polyethylene glycol with molecular weight of 20,000 (l-PEG20K) and cyclic polyethylene glycol with molecular weight of 1,000 (c-PEG1K) was ultrasonicated in acetonitrile. After evaporating the solvent, the residue was analyzed by DSC to show a remarkable decrease of crystallization temperature. Such a large crystallization suppression was not observed when linear polyethylene glycol with molecular weight of 1,000 (l-PEG1K) was added instead of c-PEG1K. Further, the mixture of cyclic polyethylene glycols (c-PEG6K and c-PEG1K) did not exhibit a significant crystallization suppression. These experimental results indicated that formation of polypseudorotaxane through ultrasonication-assisted ring penetration played an important role in the crystallization suppression. Ionic conductivities of the polypseudorotaxane-based polymer electrolytes prepared from polyethylene oxide with molecular weight of 600,000 (PEO600K) and c-PEG1K showed conductivity enhancement especially at low Li salt concentration. |
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| Keywords: | crystallization suppression ionic conductivity polypseudorotaxane polyethylene oxide ring penetration solid polymer electrolyte |
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