Abstract
A polymer type silane coupling agent (PCA) and the blend of PCA with a low molecular type silane coupling agent (APS or AAPS) were used for the surface treatment of glass beads. Effects of PCA and the blending ratio of PCA/APS or PCA/AAPS on the mechanical properties of glass beads filled epoxy composites were investigated. The results obtained are as follows. (1) PCA is effective for the improvement of fracture toughness of the composite. (2) Both of the flexural modulus and flexural strength of the composite are improved by the blending of PCA with APS or AAPS, compared to the individual surface treatment by PCA, APS or AAPS. (3) Each of the flexural strength, fracture toughness and Izod impact strength of the composite shows a maximum at the blend ratio of PCA/APS = 50/50 or PCA/AAPS = 40/60.
