Synthesis and Characterization of p-[Perfluoro-1-(2-fluorosulfonylethoxy)]ethylated Polystyrene  

作　　者：管传金 张珂 冯新亮 赵成学 

机构地区：[1]Department of Chemistry,Shanghai Jiaotong University

出　　处：《Chinese Journal of Chemistry》2003年第4期477-480,共4页中国化学（英文版）

基　　金：theNationalHigh Tech .ResearchFoundation (No .2 0 0 2AA3 2 3 0 40 )

摘　　要：A new fluorinated polystyrene bearing a p substituted perfluoro[1 (2 fluorosulfonylethoxy)]ethyl group was synthesized via one electron oxidation of polystyrene by perfluoro[2 (2 fluorosulfonyl ethoxy)]propionyl peroxide at different peroxide to polystyrene molar ratios. The yield of perfluoroalkylation decreases with the increase of the reactant molar ratio. The modified polymer has been characterized by various techniques: the ring pefluoro[1 (2 fluorosulfonylethoxy)]ethylation has been proved by FT IR and 19 F NMR; the X ray photoelectron spectra (XPS) show the maximum binding energy of F 1s , O 1s , C 1s (two kinds of carbon atoms, namely C H and C F) and S 2p , respectively; desulfonylation of the fluorinated polystyrene appearing at 217 ℃ has been found by its thermogravimetric analysis (TGA). The determinations of contact angle, refractive index and glass transition temperature of the modified polymer have disclosed that when the contact angle increases with the increase of the molar ratio, the refractive index and glass transition temperature decrease. The polydispersity values indicate that the degradation of the polymer chains did not occur during the reaction.A new fluorinated polystyrene bearing a p substituted perfluoro[1 (2 fluorosulfonylethoxy)]ethyl group was synthesized via one electron oxidation of polystyrene by perfluoro[2 (2 fluorosulfonyl ethoxy)]propionyl peroxide at different peroxide to polystyrene molar ratios. The yield of perfluoroalkylation decreases with the increase of the reactant molar ratio. The modified polymer has been characterized by various techniques: the ring pefluoro[1 (2 fluorosulfonylethoxy)]ethylation has been proved by FT IR and 19 F NMR; the X ray photoelectron spectra (XPS) show the maximum binding energy of F 1s , O 1s , C 1s (two kinds of carbon atoms, namely C H and C F) and S 2p , respectively; desulfonylation of the fluorinated polystyrene appearing at 217 ℃ has been found by its thermogravimetric analysis (TGA). The determinations of contact angle, refractive index and glass transition temperature of the modified polymer have disclosed that when the contact angle increases with the increase of the molar ratio, the refractive index and glass transition temperature decrease. The polydispersity values indicate that the degradation of the polymer chains did not occur during the reaction.

关 键 词：POLYSTYRENE perfluoro[2  (2  fluorosulfonylethoxy)]propionyl peroxide p    [perfluoro  1  (2  fluorosulfonylethoxy)]ethylated poly^styrene 

分 类 号：O631[理学—高分子化学]