| Autor: | S.I. Badr, M. Abdelaziz, A. Tawansi, A.H. Oraby |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Thermogravimetric analysis
Materials science Magnetic moment Analytical chemistry Condensed Matter Physics Polyvinylidene fluoride Magnetic susceptibility Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Condensed Matter::Materials Science Paramagnetism chemistry.chemical_compound Nuclear magnetic resonance chemistry Ferromagnetism law Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Electrical and Electronic Engineering Electron paramagnetic resonance |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 14:135-141 |
| ISSN: | 0957-4522 |
| Popis: | Polyvinylidene fluoride (PVDF) films filled with (x)CuCl2(20−x)CoCl2, where x=0.0, 0.5, 1, 5, 10, 15, 19 and 20 (wt %), were prepared by casting method. The differential thermal and thermogravimetric analysis were used to identify the melting and decomposition temperatures and the mass loss at decomposition. The X-ray diffraction revealed that the crystalline PVDF phase increases as x increases. The optical absorption spectra implied the presence of the binuclear octahedral and the high spin tetrahedral hexaquo forms for Cu2+ and Co2+, respectively. The electron spin resonance confirmed the role of Cu2+ binuclear form. The infrared spectra suggested the distribution of polarons within the nondamaged PVDF polymeric matrix due to filling. The d.c. electrical conduction was attributed to the one-dimensional interpolaron charge carrier hopping. The temperature dependence of d.c. magnetic susceptibility was of Curie–Weiss type, indicating the role of the localized energy states. The obtained paramagnetic Curie temperatures suggested the low temperature antiferromagnetic interactions for x |
| Databáze: | OpenAIRE |
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