Researchers from China synthesized two different cyclic carbonates, bisphenol AF (EC-AF) and perfluorooctyl cyclic carbonate (PFGC), respectively, in order to improve the chemical resistance of non-isocyanate polyurethane (NIPU). After synthesis of these cyclic carbonates, fluorine-containing non-isocyanate polyurethane coatings were prepared and the effects of PFGC amounts on the properties of NIPU were studied.
It was found that the contact angles of water, diiodomethane, and hexadecane were increased with the addition of PFGC and up to 106.7°, 80.2°, and 72.7°, respectively, whereas the pendulum hardness of NIPU coatings relatively decreased with the increase in PFGC contents. Moreover, the NIPU coatings exhibited excellent flexibility, adhesion, and impact resistance. The thermal stability with 5% weight loss temperature (T5%) was found to be ranging from 249 to 271°C. Moreover, these coatings possessed very low water uptake, excellent hydrophobic/oleophobic properties, and corrosion resistance properties.
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