Abstract
The interpenetrating polymer networks (IPNs) formed diglycidyl ether of bisphenol-A (DGEBA) and poly (ethylene glycol) diacrylate (PEGDA) were prepared by simultaneous polymerization techniques. 2-ethyl-4-methylimidazole was used as curing agent for DGEBA, and AIBN or BPO was used as free radical initiators for PEGDA. The curing products were analyzed by the dynamic mechanical measurements, tensile testing, fracture toughness testing and bonding testing. As the results, the product induced by AIBN initiators system, which have phase-separated IPN structure. In the case of BPO initiation systems, the resultant products have the sequential-IPN structure. The mechanical properties, tensile strength and fracture toughness were improved in comparison with 2E4MZ-cured epoxy resin. The tensile shear strength drastically increased at the acrylate content of 30wt% in the both radical initiation systems.
