Polyurethane-Poly(Ethyl Hexyl Acrylate-Co-Methyl Methacrylate) Interpenetrating Polymer Networks

: Interpenetrating polymer networks (IPNs) based on polyurethane and poly (ethyl hexyl acrylate-co- Methyl methacrylate) P (EHA-co-MMA) were prepared by a simultaneous polymerization process. The polyurethane was cross-linked with trimethylol propane and poly (ethyl hexyl acrylate-co-methyl methacrylate) with ethylene glycol dimethacrylate. The copolymers P (EHA-co-MMA) in different mole ratios (1:9, 2:8, 3:7, 4:6, and 5:5) were prepared and characterized by Fourier transform infrared spectroscopy (FT-IR), viscosity, and mechanical properties. A 2:8 (EHA/MMA) ratio of each copolymer was selected on the basis of mechanical studies to prepare the IPNs. Four different isocyanate-based IPNs were prepared and characterized by thermal and mechanical studies. The IPN based on 2,4-toluene diisocyanate (TDI) shows good film formation and better miscibility.