کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1399730 | 984489 | 2012 | 8 صفحه PDF | دانلود رایگان |

In this study conductive composite of ethylene vinyl acetate (EVA)/polyaniline (Pani) were prepared by in-situ polymerization technique. Dielectric properties (Permittivity) of the composites have been investigated with respect to concentration of Pani and frequency of electric field. For predicting permittivity of the composites, different mixing rules proposed by Lichtenecker, Bruggeman, Jaysundere–Smith, Maxwell–Wagner, and Yamada have been verified at 10, 103, and 106 Hz frequencies. It has been found that the theoretical permittivities predicted by different models differ largely from experimental permittivity when measured at 10 and 103 Hz frequencies. The limitations of the models as well as the cause of deviations between the theoretically predicted and experimentally observed results have been discussed. A new model for permittivity has been proposed by considering the generation of interface polarization between the EVA matrix and Pani particles. This model fits well with the experimentally observed results.
Figure optionsDownload as PowerPoint slideHighlights
► In-situ interfacial synthesis of polyaniline in ethylene vinyl acetate matrix.
► Applicability of different existing models to permittivity.
► Discussions regarding their validity and limitations.
► Proposition of a new model for predicting permittivity of the composite.
Journal: European Polymer Journal - Volume 48, Issue 7, July 2012, Pages 1241–1248