Synthesis, structure and fungal resistance of sulfadiazine-based polyurethane ureas

In this study, polyether-urethane prepolymers were chain-extended with sulfadiazine and additional crosslinkers to produce polymers resistant to fungi which maintain good mechanical properties. The linear polyurethane ureas with varying stoichiometric ratio were obtained by chain extension with sulfadiazine moieties. The polyurethane prepolymers were synthesized using poly(oxytetramethylene) glycol (PTMG) and 1,6-hexanediisocyanate. The sulfadiazine based-polyurethanes were characterized by FTIR spectroscopy, thermal-mechanical properties and surface properties. The effects of fungal exposure of polymers were also investigated. Atomic force microscopy images showed that the surface morphologies are dependent on the hard segment structure. Results indicate that the incorporation of sulfadiazine into the polyurethane main structure improved fungal resistance.