| 摘要 |
PCT No. PCT/GB94/00197 Sec. 371 Date Oct. 2, 1995 Sec. 102(e) Date Oct. 2, 1995 PCT Filed Feb. 2, 1994 PCT Pub. No. WO94/18262 PCT Pub. Date Aug. 18, 1994A polymer characterised by the presence of ylid linkages in the main polymer chain of formula (A) where the dashed line represents the remainder of a ring system for which the N+ provides a heteroatom, and E is a strongly electron withdrawing group. Preferred polymers in accordance with the invention are characterised by the presence of linkages in the polymer main chain of formula (I). The polymers of the invention may be fabricated as membranes for use in various separation processes, e.g. ultrafiltration, nanofiltration, and reverse osmosis. <IMAGE> (A) <IMAGE> (I)
|
