2020 Volume 56 Issue 7 Pages 263-271
Influence of addition method of silane coupling agent（ SCA） on the flexural strength and fracture toughness of silica particle-filled epoxy resin was investigated. The spherical silica particles were added to epoxy resin at amounts from 10 to 50 wt%. Two addition methods were compared, a pre-treatment method and an integral blend method in which all components were mixed simultaneously. Bonding, hydrocarbon and fluorocarbon type SCAs were employed. The bonding type has glycidoxy or amino groups that react with epoxy resin, whereas the other types have only hydrophobic chains. Higher both flexural strength and fracture toughness were obtained by the bonding type and the integral blend method. The better adhesion between particle/epoxy resin interface for the bonding type and the wettability of interface and the dispersibility for the hydrocarbon type were all obtained by the integral blend method than the pre-treatment method.
