Abstract
The effect of accelerators on the physical properties of neat epoxy resins and epoxy molding compounds was investigated. The properties of cured neat epoxy resins such as cross - linking density, glass-transition temperature, coefficient of thermal expansion, elasticity and water absorption differed depending on the type of accelerators. Similar effects of various accelerators were observed for the epoxy molding compounds which were prepared by using each resin system. However, the differences in catalytic reactivity of accelerators caused different melt viscosities to the molding compounds. This resulted in different densities, electrical resistivities and water absorptions of molded compounds. It was confirmed that the physical properties of molded compounds were affected not only by the cross-linking densities of base epoxy resins, but also by the degree of packing of the compounds.
