Dielectric spectroscopic analysis of polyvinyl chloride nanocomposites loaded with Fe2O3 nanocrystals

Polymers for Advanced Technologies - Tập 29 Số 9 - Trang 2477-2485 - 2018
Shehab A. Mansour1,2, R. A. Elsad2, Mohamed A. Izzularab3
1Advanced Materials/Solar Energy and Environmental Sustainability (AMSEES) Laboratory Menoufia University, Faculty of Engineering Shebin El-Kom Egypt
2Basic Engineering Science Department, Faculty of Engineering, Menoufia University, 32511 Shebin El-Kom, Egypt
3Electrical Engineering Department, Faculty of Engineering Menoufia University 32511 Shebin El-Kom Egypt

Tóm tắt

Iron oxide (α‐Fe2O3) nanocrystals powder was successfully synthesized via the sol‐gel method. The microstructural examination of the synthesized nanocrystals confirmed the formation of α‐Fe2O3 (hematite) structure using X‐ray diffraction and Fourier transform infrared. The synthesized nano‐hematite powder with different weight percentage up to 5 wt% was introduced to polyvinyl chloride (PVC) to fabricate PVC/Fe2O3 nanocomposites using the solution‐cast technique. The dielectric spectroscopic analysis for the investigated samples has been studied at room temperature and at different temperatures up to 120°C. The real part of the permittivity (ε′) exhibited a significant dependence on filler concentrations throughout whole temperature range. However, the dependency of both of the loss tangent (tanδ) and AC conductivity (σac) on filler concentrations is more pronounced at temperatures higher than room temperature. The obtained values of tan δ for the investigated nancomposites referred to the α‐relaxation around 70°C, which is close to glass transition temperature of the investigated PVC. The dependency of the dielectric strength on Fe2O3 nanofiller concentration was observed with enhancement in the dielectric strength reach to 20.5% for PVC/0.7 wt% Fe2O3 nanocomposite higher than the recorded value for the pristine PVC.

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Polymers for Advanced Technologies

Tập 29 Số 9

2477-2485

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