Therefore, previous studies have attempted to improve the brittleness of conventional epoxy by blending it with various thermosetting polymers. However, thermosetting/thermoplastic blends have some limitations in inducing high-strength mechanical properties because the mechanical strength of the blend is determined only by the structure of the physical entanglement between the polymer chains. These blends have also been reported to show improved heat resistance and mechanical strength than existing elastomer blends. Therefore, flexible polymers with high mechanical strength such as the thermoplastic engineering polymers polysulfone, polyester, polyamide, and even poly(ether imide) have been mixed with epoxy resin. It has been reported that adding an elastic body can rapidly decrease heat resistance and mechanical strength, although the brittleness of the epoxy resin is improved. Conventionally, to improve the brittleness of an epoxy resin, a method of adding an elastomer such as carboxyl-terminated butadiene-acrylonitrile (CTBN) or amine-terminated butadiene-acrylonitrile (ATBN) has been studied. To compensate for this shortcoming, a polymer blending technology that mixes two or more polymers has been previously investigated. However, its brittleness is a significant disadvantage in that it can be easily destroyed by impact forces.

The bisphenol A-based epoxy consisting of two epoxy groups is a representative of epoxy resins. Among the various thermosetting resins (such as epoxy, phenolic formaldehyde, and unsaturated polyester resins), epoxy resins are most commonly used due to their excellent heat resistance, corrosion resistance, high adhesion strength, and electrical insulation properties.

Intel ipdt