Microstructure, mechanical and electrical properties of Glass Fiber Reinforced Composites (GFRC)

Abstract

In this study, the influence of E-glass fiber and mineral filler content on the microstructure, physical, mechanical and dielectric properties of Glass Fiber Reinforced Composites (GFRC) was investigated. Five sets of GFRC, based on polymer resin with varying E-grade glass fibers and CaCO3 mineral filler weight fractions (15/64, 20/59, 25/54, 30/49, 35/44), were commercially prepared. Test specimens were prepared by compression molding. Scanning Electron Microscope images revealed that at higher concentrations, the fibers clustered together, resulting in heterogeneous microstructures. Characterization of the composites showed that glass fiber content and distribution significantly affects the mechanical properties. The flexural strength of the composites decreased with increasing glass fiber content. The dielectric constant ε` decreased with increasing fiber content.