A sulfur-containing long heterochain perfluoroalkyl enoate and its preparation method

Abstract

The invention discloses a sulfur-containing long heterochain perfluoroalkyl enoate and a preparation method thereof. Using nonafluorobutyltetrafluorosulfur halide as the end-capping agent, after tetrafluoroethylene undergoes telomerization reaction, the obtained 5-thiaperfluorononyl-1-halogen and ethylene gas are reacted by one-electron addition to obtain 1H,1H,2H,2H‑7‑Thiaperfluoroundecyl‑1‑halogen; esterification with silver enoate to give 1H,1H,2H,2H‑thiaperfluoroundecyl acrylate. The sulfur-containing long heterochain perfluoroalkyl enoate prepared by the invention contains carbon-carbon double bonds that are easy to free radical polymerization, and can be used for preparing fluorine-containing polymers and copolymers. Due to the crystallinity of the long heterochain perfluoroalkyl group, the prepared fluoropolymer has no surface reconstruction phenomenon when in contact with liquid, and can provide excellent liquid repellency. At the same time, the perfluoroalkyl long heterochain contains carbon-sulfur heterobonds, is easy to degrade, has no cumulative toxicity, and is not within the scope of banned fluorine-containing chemicals.

Description

technical field

[0001] The invention relates to a sulfur-containing long heterochain perfluoroalkyl acrylate and a preparation method thereof, in particular to a sulfur-containing long heterochain perfluoroalkyl acrylate, a sulfur-containing long heterochain perfluoroalkyl methacrylic acid The ester and the preparation method thereof belong to the technical field of polymer monomer and fine chemical synthesis. Background technique

[0002] Fluoroalkyl side chains of fluoropolymers are functional groups that provide low surface energy and water and oil repellency. These functional groups are densely arranged on the surface of the polymer to form a surface that is difficult for liquids to wet. The surface energy of fluoropolymers is determined by the pendant fluoroalkyl groups and has nothing to do with the main chain of the polymer molecule. Therefore, which fluorine-containing side group is used determines the surface properties of the fluorine-containing material. [0003...

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