| 초록 |
In this work, the surface properties and mechanical interfacial properties of the silica treated by silane coupling agents, such as γ-methacryloxy propyl trimethoxy silane (MPS) and γ-glycidoxy propyl trimethoxy silane (GPS), were investigated. To understand the role of interfacial adhesion of silica/rubber composites, the contact angles of the silane-treated silica were measured by the wicking method on the basis of the modified Washburn equation. As a result, the silane-treated silica led to increase the surface free energy, mainly because of their increased specific or polar component. The mechanical interfacial behaviors of the composites determined by composite tearing energy (GIIIC) were also improved in the case of silane-treated composites. The surface free energy and GIIIC especially showed a maximum value in the presence of MPS silane coupling agent. It revealed that the increase of the specific component of surface free energy or hydrogen bonding between the silica and the coupling agents played an important role in improving the degree of adhesion at interface in a composite system. |
