| 摘要 |
An aromatic polysulfone ether/polythioether sulfone copolymer having the formula: <IMAGE> (I) <IMAGE> wherein each of R1 and R2 which may be the same or different, is hydrogen, halogen or a hydrocarbon group having from 1 to 8 carbon atoms, each of a and b which may be the same or different, is an integer of from 0 to 4, Ar is a bivalent aromatic residue selected from the group consisting of: <IMAGE> +TR <IMAGE> wherein each of R3, R4 and R5 which may be the same or different, is hydrogen, or a hydrocarbon group having from 1 to 8 carbon atoms, each of c to e which may be the same of different, is an integer of from 0 to 4, Y is a single bond, -O-, -S-, -SO-, -SO2-, <IMAGE> wherein R is hydrogen or a hydrocarbon group having from 1 to 6 carbon atoms, and each of m and n is an integer indicating the degree of polymerization and m:n is from 1:20 to 20:1, said copolymer having an inherent viscosity eta inh of from 0.1 to 1.5 as measured at 30 DEG C. with respect to its solution having a concentration of 0.5 g/dl in a solvent mixture of phenol/1,1,2,2-tetrachloroethane (3/2 by weight ratio).
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