| abstract |
Polyethersulfones having Tg greater than about 225° C. and a notched Izod value greater than about 1 ft-lb/in, as measured by ASTM D256, comprise from about 5 mol % to less than about 40 mol % structural units of formula 1; and n n nfrom greater than about 60 mol % to about 95 mol % structural units of formula 2 n nwherein n R 1 , R 2 , and R 3 are independently at each occurrence a halogen atom, a nitro group, a cyano group, a C 1 -C 12 aliphatic radical, C 3 -C 12 cycloaliphatic radical, or a C 3 -C 12 aromatic radical; n, m, q are independently at each occurrence integers from 0 to 4; and Q is a C 3 -C 20 cycloaliphatic radical, or a C 3 -C 20 aromatic radical. |