The direct fluorination of a porous functionalized polymer

Macroporous sulfonated polystyrene ion exchange resin was reacted with elemental fluorine in a liquid-phase suspension reactor at low temperature. This method gave retention of the bulk structure of the resin bead and resulted in a space-selective distribution of fluorine across the resin bead cross-section, as determined using ¹⁹F secondary ion mass spectroscopy (LMI-SIMS). The polymer modification was additionally characterized using x-ray photoelectron spectroscopy, photoacoustic IR spectrophotometry, ¹⁹F, and ¹³C MAS NMR spectrometry, and mercury porosimetry. © 1994 John Wiley & Sons, Inc.