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FLUORINATED ETHERS--A NEW FAMILY OF HALONS?
Citation:
Adcock, J., S. Mathur, H. Huang, P. Mukhopadhyay, B. Wang, AND N. Smith. FLUORINATED ETHERS--A NEW FAMILY OF HALONS? U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-92/212.
Description:
The paper discusses the possiblity of fluorinated ethers' being a new family of halons. or at the University of Tennessee to find suitable replacements for fully halogenated chlorofluorocarbons (CFCs) and halons has centered on the incorporation of oxygen as a heteroatom. he most stable class of compounds, fluorinated ethers, potentially doubles the number of candidates versus just the halogenated alkanes, with minimal change in physical properties. he first comaprison of compounds involves the dimethyl ether series of compounds which provide substitutionally similar analogs to ethanes. he synthesis, characterization, and physical properties of all of the perfluorinated ethers are discussed briefly and their extinguishment concentrations are tabulated. he work indicates that the mechanism by which perfluorocarbons achieve their flame extinguishment capability is rooted more in the ability to dissipate the energy of free radicals and permit their recombination, than it is by any bond dissociative or other purely chemical mechanism. his implies that, in the absence of overriding chemical effects (bromine), there should be a correlation between infrared absorptivity and extinguishant effectiveness.