Experimental study of dielectric properties of composite materials pozzolan/DGEBA

• Published in: Polymer composites Vol. 38; no. 2; pp. 324 - 331
• Main Authors: Irekti, Amar, Bezzazi, Boudjema, Smith, Agnès, Aribi, Chouaib
• Format: Journal Article
• Language: English
• Published: Newtown Blackwell Publishing Ltd 01.02.2017; Wiley
• Subjects: Bisphenol A; Chemical Sciences; Composite materials; Dielectric properties; Dielectrics; Engineering Sciences; Ethers; Fillers; Material chemistry; Materials; Pozzolans; Scanning electron microscopy
• ISSN: 0272-8397; 1548-0569
• DOI: 10.1002/pc.23589

The subject of composite materials with reinforced filler has been studied recently. This study to improve both the dielectric and structural characteristics of diglycidyl ether of bisphenol a (DGEBA) focused on the appropriate use (from 5% to 60 wt%) of pozzolan filler mechanically grinded to obtain a very fine particle size (Ø < 10 μm) and area surface of 23.5 m2 g−1. The dielectric properties were investigated at great filler concentrations by weight. Epoxy microcomposite samples with a good dispersion of nanoparticles in the epoxy matrix were prepared and experiments were performed to measure the capacitance (C), the electrical resistance (R), and impedance (Z) as a function of frequency (1 kHz–10 kHz). Measurements were made using dielectric spectroscopy over the temperature range 25–80°C. Using the scanning electron microscope (SEM), the morphologies and structure of the surface and fracture surfaces of Pozzolan/DGEBA composites were observed. POLYM. COMPOS., 38:324–331, 2017. © 2015 Society of Plastics Engineers