Academic Journal
Structure and electrical properties of potassium-doped siloxane-poly(oxypropylene) ormolytes
| العنوان: | Structure and electrical properties of potassium-doped siloxane-poly(oxypropylene) ormolytes |
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| المؤلفون: | Chaker, J., Dahmouche, K., Briois, V, Santilli, Celso Valentim, Pulcinelli, Sandra Helena, Judeinstein, P. |
| المساهمون: | Universidade Estadual Paulista (UNESP) |
| بيانات النشر: | Kluwer Academic Publ |
| سنة النشر: | 2003 |
| المجموعة: | Universidade Estadual Paulista São Paulo: Repositório Institucional UNESP |
| مصطلحات موضوعية: | siloxane-PPO hybrids, solid ionic conductor, EXAFS, XANES |
| الوصف: | The structure and the ionic conduction properties of siloxane-poly(oxypropylene) (PPO) hybrids doped with different potassium salts (KCF3SO3, KI, KClO4 and KNO2) are reported for two polymer molecular weights (300 and 4000 g/mol), labelled PPO300 and PPO4000, respectively. The doping concentration, related to the concentration of the ether type oxygen of the PPO chain, is the same whatever the salt and verifies [O]/[K] = 20. Ionic room temperature conductivity shows the highest value for the KCF3SO3 doped PPO4000 hybrid (4 x 10(-7)Omega(-1).cm(-1)). The structure of these hybrids was investigated by X-ray powder diffraction (XRPD) and X-ray absorption spectroscopy (EXAFS and XANES) at the potassium K-edge (3607 eV). XRPD results show that the hybrid matrix is always amorphous and the formation of secondary potassium phases is observed for all the samples, except for the KCF3SO3 doped PPO4000 hybrid. EXAFS results evidence a good correlation between the ionic conductivity and the presence of oxygen atoms as first neighbours around potassium. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | 1075-1080 |
| اللغة: | English |
| تدمد: | 0928-0707 |
| Relation: | Journal of Sol-Gel Science and Technology; 1.745; 0,477; http://dx.doi.org/10.1023/A:1020702606334; Journal of Sol-gel Science and Technology. Dordrecht: Kluwer Academic Publ, v. 26, n. 1-3, p. 1075-1080, 2003.; http://hdl.handle.net/11449/35221; WOS:000178789100199; 5584298681870865; 9971202585286967; orcid:0000-0002-8356-8093 |
| DOI: | 10.1023/A:1020702606334 |
| الاتاحة: | http://hdl.handle.net/11449/35221 https://doi.org/10.1023/A:1020702606334 |
| Rights: | closedAccess |
| رقم الانضمام: | edsbas.1BF1864D |
| قاعدة البيانات: | BASE |
| تدمد: | 09280707 |
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| DOI: | 10.1023/A:1020702606334 |