Preparation, characterization and catalytic activity of polystyrene with pendent perfluoroalkylsulfonylimide groups

✍ Scribed by Jiezhan Xiao; Zhengbo Zhang; Jin Nie

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 325 KB
• Volume: 236
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/j.molcata.2005.04.025

✦ Synopsis

The new type of polystyrene with pendent perfluoroalkylsulfonylimide groups polymer (PPFSI or P-SO 2 NHSO 2 R f , where P is the polymer chain, R = CF 3 , CF 2 CF 2 CF 2 CF 3 ) was prepared by chemical modification of chlorosulfanated poly(styrene-co-divinybenzene) resins with perfluoroalkylsulfonylamides R f SO 2 NH 2. Acid strength of the PPFSI was tested by the Hammett indicator method, acid contents of the PPFSI were determined by acid-base titration and the nature of chemical modification for the PPFSI was evaluated by IR, TGA and SEM. The results indicated that the PPFSI was a strongly acidic polymer, which could be tolerant of high temperature, and an effective catalyst for direct condensation of carboxylic acids and alcohols.