Electrical and Electrorheological Properties of Alumina/Natural Rubber (STR XL) Composites

The electrorheological properties (ER) of natural rubber (XL)/alumina (Al(2)O(3)) composites were investigated in oscillatory shear mode under DC electrical field strengths between 0 to 2 kV/mm. SEM micrographs indicate a mean particle size of 9.873 ± 0.034 µm and particles that are moderately dispe...

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Detalles Bibliográficos
Autores principales: Tangboriboon, Nuchnapa, Uttanawanit, Nuttapot, Longtong, Mean, Wongpinthong, Piraya, Sirivat, Anuvat, Kunanuruksapong, Ruksapong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International 2010
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5525185/
http://dx.doi.org/10.3390/ma3010656
Descripción
Sumario:The electrorheological properties (ER) of natural rubber (XL)/alumina (Al(2)O(3)) composites were investigated in oscillatory shear mode under DC electrical field strengths between 0 to 2 kV/mm. SEM micrographs indicate a mean particle size of 9.873 ± 0.034 µm and particles that are moderately dispersed in the matrix. The XRD patterns indicate Al(2)O(3) is of the β-phase polytype which possesses high ionic conductivity. The storage modulus (G′) of the composites, or the rigidity, increases by nearly two orders of magnitude, with variations in particle volume fraction and electrical field strength. The increase in the storage modulus is caused the ionic polarization of the alumina particles and the induced dipole moments set up in the natural rubber matrix.

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