申请人:DU Naiying
公开号:US20140243441A1
公开(公告)日:2014-08-28
A polymer of formula (I):
where: n is an integer from 10 to 5,000; m is an integer from 10 to 5,000; Ar1 and Ar3 are the same or different and are residues derived from a tetra-hydroxy aromatic monomer, the tetra-hydroxy aromatic monomer being
wherein R is the same or different and is H or a C
1
-C
8
alkyl, C
2
-C
8
alkenyl or C
3
-C
8
cycloalkyl group; and, Ar2 and Ar4 are the same or different and are residues derived from a tetra-halogenated aromatic monomer, the tetra-halogenated aromatic monomer being
wherein X is F, Cl or Br, and R1 and R2 are the same or different and are
wherein y is an integer from 1 to 8; with the proviso that when Ar1 is the same as Ar3 and Ar2 is the same as Ar4, R1 and R2 are not both —CN is useful as a material for gas separation, vapor separation, adsorbents or catalysis.