High performance polyester sulfone oligomers are prepared for aerospace
applications by condensing mono- or difunctional crosslinkable end caps
(i.e. unsaturated hydrocarbons having one or two crosslinking sites) with
dicarboxylic acid halides and dialcohols (i.e. diols). Multidimensional
oligomers have an aromatic hub from which the polyester chains radiate.
Blends of the linear and multidimensional oligomers can be made using
compatible, non-crosslinking polymers. Prepregs and composites are formed
from the oligomers or blends.