Thermal-Oxidative Pretreatment and Evaluation of Poly(hexafluoropropene Oxide) Fluids
Two commercial poly(hexafluoropropene oxide) fluids were thermally pretreated at 343 C in pure oxygen. IR and nuclear magnetic resonance(NMR) spectra indicate that this pretreatment was effective in removing hydrogen end-capped impurities. A decrease in the quantity of volatile material produced during thermal oxidative decomposition and increase in the thermal decomposition temperature indicated improvement in the stability of the fluids. However, this pretreatment failed to render the fluids completely stable in oxidizing atmospheres at 316 C in the presence of metal alloys.
Helmick, L. S. (1994). Thermal-Oxidative Pretreatment and Evaluation of Poly(hexafluoropropene Oxide) Fluids. NASA Technical Memorandum (106659).