Polyethersulfone compositions with high heat and good impact resistance

1. A polyethersulfone having Tg greater than about 235° C. and a notched Izod value greater than about 1 ft-lb/in, said polyethersulfone consisting of

from about 10 mol % to less than about 40 mol % structural units of formula 1A; and

from greater than about 60 mol % to about 90 mol % structural units of formula 2

wherein

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; and

n, m, q are independently at each occurrence integers from 0 to 4.

2. A polyethersulfone according to claim 1 , consisting of

from about 10 mol % to about 30 mol % structural units of formula 1A; and

from about 70 mol % to about 90 mol % structural units of formula 2.

3. A polyethersulfone according to claim 1 , consisting of

from about 15 mol % to about 30 mol % structural units of formula 1A; and

from about 70 mol % to about 95 mol % structural units of formula 2.

4. A polyethersulfone according to claim 1 , consisting of

from about 10 mol % to about less than about 35 mol % structural units of formula 1A1; and

from greater than about 65 mol % to about 90 mol % structural units of formula 2B

5. A polyethersulfone according to claim 1 , consisting of

from about 5 mol % to about 15 mol % structural units of formula 1A; and

from about 85 mol % to about 95 mol % structural units of formula 2.

6. An article comprising a polyethersulfone according to claim 1 .