FLUOROETHERS AND FLUOROAMINES

Many perfluoroaUphatic ethers and tertiary amines have been prepared by electrochemical fluorination (1 6), direct fluorination using elemental fluorine (7—9), or, in a few cases, by fluorination using cobalt trifluoride (10). Examples of lower molecular weight materials are shown in Table 1. In addition to these, there are three commercial classes of perfluoropolyethers prepared by anionic polymerization of hexafluoropropene oxide [428-59-1] (11,12), photooxidation of hexafluoropropene [116-15-4] or tetrafluoroethene [116-14-3] (13,14), or by anionic ring-opening polymeriza tion of tetrafluorooxetane [765-63-9] followed by direct fluorination (15). 

Name CAS Registry Number Molecular formula Bp, °c df d Pour poiat, °C 

CgF gO represents a mixture of isomers of cycHc perfluoroaUphatic ethers, primarily perfluoro-2-butyltetrahydrofuran [335-36-4]. 

Kirk-Othmer Encyclopedia of Chemical Technology (4th Edition) 

Many of the unusual properties of the perfluorinated inert fluids are the result of the extremely low intermolecular interactions. This is manifested in, for example, the very low surface tensions of the perfluorinated materials (on the order of 9-19 mN jm. = dyn/cm) at 25°C which enables these Hquids to wet any surface including polytetrafluoroethene. Their refractive indexes are lower than those of any other organic Hquids, as are theh acoustic velocities. They have isothermal compressibilities almost twice as high as water. Densities range from 1.7 to 1.9 g/cm (l )- 

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FLUORINECOMPOUNDS,ORGANIC - FLUOROETHERS AND FLUOROAMINES] (Vol 11) Perfluoro-1,3-dimethylcyclohexane [335-27-3]... 

Fluoroethene. See Vinyl fluoride Fluoroether and fluoroamine production, economic aspects of, 11 884 Fluoroethers and fluoroamines, 11 877-888 chemical properties of, 11 879—881 health and safety factors related to,... 

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