Polyurethane-epoxy maleate of bisphenol A semi-interpenetrating polymer networks

Semi-interpenetrating polymer networks were synthesized starting from polyu rethane (PU) and epoxy maleate of bisphenol A (EMBA). Differential scanning calorimetry and swelling measurements showed good miscibility and the pres ence of the strong intermolecular interactions within the synthesized netwo rks. The physicomechanical properties increased against PU to a maximum val ue with the increasing of EMBA content up to 12 wt % and then decreased wit h further increasing EMBA content. Generally, with exception of the elongat ion at the limit of elasticity, the mechanical properties improved very muc h under action of the UV radiation. (C) 2002 John Wiley & Sons, Inc.