Internal stress of epoxy resin modified with acrylic polymers produced byin situUV radiation polymerization

摘要

AbstractA cured epoxy resin is modified with polybutyl acrylate (A) and polyethyl acrylate (B) produced byin situultraviolet radiation polymerizations of their corresponding monomers in the epoxy resin, respectively, to reduce the internal stress. In the A system, a heterogeneous structure with submicron domains was formed. In the B system, however, the B mixed well with the epoxy matrix. In both systems, the internal stress was decreased by the modification. The glass transition temperature of the epoxy matrix decreased in the B system more than in the A system. The A‐modified resin was superior to the B‐modified resin in reducing the internal stress without decreasing the thermal resistance of epoxy re