this invention relates to a new class of novel inorganic - organic hybrid polymers that are formed from linear inorganic - organic hybrid polymers of varying molecular weight . these new high temperature oxidatively stable thermosetting polymers are formed from linear polymeric materials having repeat units that contain at least one alkynyl group for cross - linking purposes and at least one biscarboranyl group . these novel organoboron thermoset polymers contain an unsaturated cross - linked hydrocarbon moiety .