| 摘要 |
An aromatic polyethersulphone incorporating sub-unit (I) where A is an electron withdrawing group, the designation "o,p" represents that the bond is at the ortho or para position to the A group, and X is selected from: -OH; -O-Mn+ where M is an organic or inorganic cation (other than hydrogen) and n is at least 1; -NR1R2 where R1 and R2 are the same or different and are selected from hydrogen, and alkyl, aryl, aminoalkylene or ammonoalkylene groups; and OR3 where R3 is an alkyl or aryl group; either as the only sub-units of the polymer or in combination with comonomer units. The polymers are useful for the production of membranes for separation processes.
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