The Synthesis And Characteristics Of Water Borne Fluorine-Containing Emulsion

Fluorine is the most negative-electronic element,So negative charges gathered around fluorine atoms and electron cloud covered densely in polymers. That the neighboring fluorine atoms repel mutually make the fluorine atoms which connect with the main chain of the fluorine-containing polymers spiral-shaped distribution along the zigzag carbon-carbon chain. The radius of fluorine atom is extremely small,so the main chain protected well. The fluorine-carbon bond of the fluorine-containing polymer is short so the bond energy is very big. The polarizability of fluorine atom is low. Therefore,the fluorine-containing polymers have many special performances such as the thermo stability,the chemical stability and the weather-resistant,the low surface energy,the non-adherence,chemistry corrosiveness resistant,the water-repellency, and so on.The fluorine-containing acrylate was synthesized by hexafluoropropylene trimer,HEMA and other monomers on the condition of tri-ethylamine (NEt3)'s existence in this thesis. The fluorine-containing emulsion was copolymerized with this special fluorine-containing acrylate, BA, MMA, AA. The Fluorine-containing emulsion was stable. And the stability of this emulsion and the film's water-repellency are researched.With tri-ethylamine (NEt3)'s existence,FNEMA was synthesized by directly mixed-reaction of C9F18 and HEMA. In this process, this is no solvent.