CHEMICAL MODIFICATION OF POLYARYLENE ETHER SULFONE POLYMERS - PREPARATION AND PROPERTIES OF MATERIALS AMINATED ON THE MAIN CHAIN

Copolymers of ether ether sulphone/ether sulphone moieties have been nitrated exclusively, and controllably, on the hydroquinone unit using a conventional nitrating mixture in nitrobenzene. Reduction of these materials with sodium dithionite affords the corresponding animated species, which have been converted to crosslinkable materials by combination with epoxies and methylene diphenyl diisocyanate and by formation of maleimide groups. Some of the properties of the nitrated and animated materials are briefly reported.