Abstract: Polyurethane/(vinyl ester resin) interpenetrating polymer network (PU/VER IPN) materials with broad temperature ranges and excellent damping properties from low temperature to room temperature were prepared. The influence of comonomers and component ratios on the compatibility and damping properties of IPN materials was studied by DMA which indicates that such properties are improved by introducing acrylic esters instead of polystyrene (PSt) into VER comonomer system. The detected results of microstructure by AFM show that the phase ranges of the dual-phase continuous IPN materials obtained are both in nanometer scale. The results of mechanical properties show that IPN materials show the regulation from elastic deformation to brittle deformation with the increase of VER proportion.

Key words: Interpenetrating polymer network, Vinyl ester resin, Damping materials, Compatibility