High corrosion resistant - redox active - moisture curable - conducting polyurethanes

New series of electrochemically active conducting polyurethanes (CPU) have been prepared using tetraaniline as conducting unit with IPDI-PTMG as urethane prepolymer segment. These films are robust and formed as a consequence of moisture curing of excess isocyanate. The films are novel in the sense that the conductivity is found to be in the higher side of the order of 10(-3) S/cm and the tetraaniline segments are electrochemically oxidizable and/or reducible. The formed films have been subjected for thermal and mechanical tests such as TGA, DSC, DMTA and tensile tests to explore into the understanding of structure-property relations. The nano/microstructure of the polymers has been investigated by TEM analysis. These CPUs are found to be excellent anti-corrosion barrier coatings for mild steel. (C) 2016 Elsevier B.V. All rights reserved.