Record Display for the EPA National Library Catalog

RECORD NUMBER: 13 OF 26

OLS Field Name OLS Field Data
Main Title Fluroinated Ethers: A New Family of Halons.
Author Adcock, J. L. ; Mathur, S. B. ; Huang, H. Q. ; Mukhopadhyay, P. ; Wang, B. H. ;
CORP Author Tennessee Univ., Knoxville. Dept. of Chemistry.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher 1991
Year Published 1991
Report Number EPA-R-815147; EPA/600/A-92/212;
Stock Number PB93-106813
Additional Subjects Ethers ; Fluorine organic compounds ; Substitutes ; Air pollution control ; Ozone ; Fluorination ; Chemical reactions ; Halohydrocarbons ; Fire extinguishing agents ; Molecular spectra ; Fluorinated ethers
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB93-106813 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/08/1993
Collation 12p
Abstract
The paper discusses the possibility of fluorinated ethers' being a new family of halons. Work 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. The most stable class of compounds, fluorinated ethers, potentially doubles the number of candidates versus just the halogenated alkanes, with minimal change in physical properties. The first comparison of compounds involves the dimethyl ether series of compounds which provide substitutionally similar analogs to ethanes. The synthesis, characterization, and physical properties of all of the perfluorinated ethers are discussed briefly and their extinguishment concentrations are tabulated. The 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 recombindation, than it is by any bond dissociative or other purely chemical mechanism. This implies that, in the absence of overriding chemical effects (bromine), there should be a correlation between infrared absorptivity and extinguishant effectiveness.