In addition to fluorine atoms, the following elements can also improve the corrosion resistance of organic polysilazanes:
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Chlorine (Cl): Chlorine atoms have high electronegativity, which can make the charge distribution of organic polysilazane molecules uneven, enhance the intermolecular forces, increase the density of the material, and hinder the intrusion of corrosive substances. At the same time, chlorine-containing groups can, to a certain extent, improve the chemical stability of the polymer, helping to enhance the corrosion resistance of organic polysilazanes.
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Boron (B): Boron atoms can form special chemical bonds with silicon, nitrogen and other atoms, which can improve the molecular structure of organic polysilazanes, and enhance their thermal stability and chemical stability. For example, the introduction of boron elements can increase the degree of cross-linking of the material, forming a more stable three-dimensional network structure, making it more difficult for the material to be damaged in the face of a corrosive environment, thus improving the corrosion resistance.
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Phosphorus (P): Phosphorus atoms can participate in the formation of some chemical bonds or functional groups with special properties. Introducing phosphorus elements into organic polysilazanes can improve the flame retardancy of the material, and also improve its corrosion resistance to a certain extent. Phosphorus elements can react with corrosive substances to form a protective film on the surface of the material, preventing further corrosion.
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Titanium (Ti): Titanium has good chemical stability and corrosion resistance. Introducing titanium elements into organic polysilazanes can form some compounds or composites with special properties. Titanium elements can improve the hardness and wear resistance of the material, and also enhance its stability in some corrosive environments, helping to improve the corrosion resistance of organic polysilazanes.
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Zirconium (Zr): Zirconium elements are similar to titanium elements, having high chemical stability and corrosion resistance. Adding zirconium elements to organic polysilazanes can improve the high-temperature resistance and chemical corrosion resistance of the material. Zirconium elements can interact with certain groups in the organic polysilazane molecules, improve the overall performance of the material, and enhance its ability to resist corrosion.
