Effect of Nano/micro Silica on Electrical Property of Unsaturated Polyester Resin Composites

Abstract

The addition of nano/micro silica into unsaturated polyester resin (UPR) results in the improvement of the electricalproperties of Silica-UPR composites. The surface, volume resistivity, dielectric strength, dissipation factor and dry arcresistivity of nano silica-UPR composites were found to improve significantly. The effects of the nano and micro fillersin UPR have been evaluated. They are presented in this paper. To evaluate the electrical properties of the nano &micro composites, all the measurements were done as per the prescribed methods in ASTM. It was observed that theaddition of nano silica improves the electrical properties as compared to micro silica. The better dispersion of silicaparticles in unsaturated polyester resin enhances the electrical properties of silica-UPR composites

Ethylene vinyl acetate films filled with ytterbium containing rare earth particles (Y2SiO5: Ce3+, Yb3+) which have optical down-conversion capabilities and useful for encapsulating solar cells

“…19,33,34 Encapsulation materials were designed to protect the inner components of the module against external stresses, as well as to act as an electrical insulator. 35 Figure 6 shows the bulk electrical film resistivity versus Y 2 SiO 5 : Ce 3þ , Yb 3þ concentration. Bulk electrical resistivity decreases with added Y 2 SiO 5 : Ce 3þ , Yb 3þ .…”

Preparation and properties of melamine formaldehyde resin modified by functionalized nano-SiO2 and polyvinyl alcohol

“…In addition, numerous studies have shown that the toughness of polymer composites can be considerably improved by introducing nano-silicon dioxide (SiO 2 ). 16 -21 In this work, MF resin composites with improved toughness and high flame resistance were successfully prepared through compounding MF prepolymer with a relatively small amount of PVA and 3-aminopropyltriethoxysilane (KH-550) grafted nano-SiO 2 . Modified nano-SiO 2 can greatly enhance the compatibility of the MF prepolymer and PVA, which promote the storage stability of the MF prepolymer/PVA mixture and the interfacial bonding between MF resin and PVA in the final material.…”

Effects of Nano-silica/Nano-alumina on Mechanical and Physical Properties of Polyurethane Composites and Coatings

“…As the refractive index difference between the inorganic material and the resin matrix increases, particle size must be reduced, to prevent scattering of light that leads to haze in the composite clear coating [3]. It has been reported that nanosilica can increase the hardness and scratch resistance of a coating, and keep the coating clear at the same time [4,5]. Nano-silica particles could more effectively improve the hardness, abrasion resistance, and scratch resistance of acrylic-based PU coats than micro-silica particles [6].…”