it can be used in organic synthesis is mainly used in synthetic plastics, especially the synthesis of dinitrogen miscellaneous naphthalene poly (aryl ether ketone ketone polymer poly (aryl ether ketone, this kind of polymer because it has excellent heat resistance, water resistance, chemical corrosion resistance, heat aging resistance and good processing formability, fiber, coating and made of the composite materials is widely applied in many areas, such as electronic appliances, mechanical equipment, transportation, aerospace, nuclear engineering and military and other fields.