| 摘要 |
<p>Polymeric adsorbents exhibiting improved porosity and adsorption are produced from lightly crosslinked macroreticular aromatic copolymer beads by postcrosslinking the copolymer beads while in a swollen state, the crosslinks resulting from the post-crosslinking comprising the residue of an external crosslinker selected from a polyfunctional alkylating agent, a polyfunctional acylating agent, and a sulfur halide. An acid catalyst is used for the post-crosslinking, such as a Friedel Crafts catalyst. The adsorbents may be functionalized to ion exchange resins.</p> |
