IMPROVED PERFLOUROALKYLETHER FLUID DEVELOPMENT

AEROSPACE APPLICATIONS REQUIRE FLUIDS WHICH CAN SERVE UNDER OXIDIZING CONDITIONS AT EXTREMES OF TEMPERATURE. THE MATERIALS AVAILABLE AT PRESENT CANNOT FULFILL ALL THESE REQUIREMENTS. THE OBJECTIVE OF THIS PROGRAM IS TO SYNTHESIZEWIDE TEMPERATURE RANGE FLUIDS STABLE IN AIR, IN THE PRESENCEOF METALS, AT GREATER THAN 300 DEGREES CELCIUS. THE APPROACHVISUALIZED CONSISTS OF CONTROLLED DEGRADATION OF COMMERCIALLY AVAILABLE UNBRANCHED POLY (PERFLOUROALKYLETHERS), TO REMOVE WEAK LINKAGES, FOLLOWED BY END-CAPPING OF THE RESULTANT ACID FLOURIDES WITHMONOPHOSPHASTRIAZINE RINGS. VISCOSITY TEMPERATURE PROFILES, THERMAL AND THERMAL OXIDATIVE STABILITY, AND THE INFLUENCE METAL ALLOYS ON DEGRADATION IS DETERMINED FOR THE OBTAINED FLUIDS. THE STUDY SHOULD LEAD TO THE DEVELOPMENT OFLUBRICATING FLUIDS OF UNIQUE PROPERTIES AMENABLE TO USE EITHER ALONE OR AS CO-FORMULATORS BOTH WITH BRANCHED AND UNBRANCHED PERFLOUROALKYLETHERS.