Correlation between local structure and ionic conductivity of potassium-doped siloxane poly(propyleneoxyde) ormolytes
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Data
2005-12-01
Autores
Chaker, Juliano [UNESP]
Dahmouche, Karim [UNESP]
Briois, Valérie
Santilli, Celso Valentim [UNESP]
Pulcinelli, Sandra Helena [UNESP]
Judeinstein, Patrick
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Resumo
The local order around K for K(CF3SO3) doped Siloxane-Poly(propyleneoxide) hybrids at different doping concentration was investigated by x-ray absorption spectroscopy (EXAFS and XANES) at the potassium K-edge. The results indicate that the use of HCl as hydrolytic catalyst for gelation induces the precipitation of KCl. The ionic conductivity is strongly related to the presence of oxygen atoms as first neighbours around potassium and to the amount of KCl precipitate. © Physica Scripta 2005.
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Palavras-chave
Doping (additives), Extended X ray absorption fine structure spectroscopy, Gelation, Ionic conductivity, Precipitation (chemical), Hydrolytic catalysts, Ormolytes, Siloxanes, Potassium
Como citar
Physica Scripta T, v. T115, p. 516-519, 2005.