抄録
Effect of silane coupling treatment of glass fibers on mechanical properties of single-laminate epoxy resin reinforced with plain-woven glass fabric was studied. The microfracture along transverse fibers during tensile test was recorded on a video recorder and analyzed with image processing. In order to examine the effect of interfacial reinforcement on the initial microfracture stress and strain, glass fibers were treated with silane coupling agents at different concentrations. The initial microfracture stress and strain increased with silane concentration. At low concentrations, however, initial microfracture stress and strain did not increase. The reinforcement in warp direction was more improved than that in weft direction. The scanning electron microscopic observation of warp and weft fibers at the fracture surface showed no difference in adhesion between two tensile directions. From the observation of cross sections of the specimens, the fabric structure such as the expansion of fiber bundle or the degree of bending of the fibers, was different between warp and weft directions, which suggested that the fabric structure affected the microfracture stress and strain.
