Document ID: EPA-HQ-OAR-2007-0089-0009
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2012-03-23T04:00Z

http://www.ingentaconnect.com/content/els/00221139/1999/00000095/00000001/art00297

Hydrofluoropolyethers 
Authors: Marchionni G.1; Silvani R.; Fontana G.; Malinverno G.; Visca M.
Source: Journal of Fluorine Chemistry, Volume 95, Number 1, 4 June 1999 , pp. 41-50(10)
Publisher: Elsevier
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Abstract:
,-Dihydrofluoropolyethers (HFPEs) have been synthesized by a novel process consisting of radical-initiated oxypolymerization of tetrafluoroethylene, chemical cleavage of peroxy groups, and chemical modification of the resulting difunctional fluoropolyethers. The physicochemical properties of the HFPEs depend upon the molecular weight, and are influenced by their hydrogen atoms. The effect of terminal hydrogens is however reduced with increasing molecular weight. The HFPE molecules show a certain degree of polarity, which allows miscibility with polar solvents. The hydrogen abstraction reaction is a limiting factor in the atmospheric lifetime of this class of products, thus reducing their environmental impact.The preliminary toxicological tests indicate the products to be substantially nontoxic.
Keywords: Hydrofluoropolyethers; Fluorinated fluids; Physicochemical properties; Environmental impact 
Language: English 
Document Type: Research article 
DOI: 10.1016/S0022-1139(98)00297-8
Affiliations: 1: Ausimont SpA, R & D Centre, Via S. Pietro, 50, 20021, Bollate, Italy 
Publication date: 1999-06-04