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Synthesis of Perfluorinated Ethers by an Improved Solution Phase Direct Fluorination Process by Allen C. Sievert; Walter R. Tong; Mario J. Nappa is a Chemistry article available to read on EtoBox.

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We have developed schemes to make perfluorinated ethers that cover a wide range of molecular weights and boiling points. We describe a relationship that can be used to predict the boiling points of pertluoro polyethers; this is used to assist in the combination of reagents for synthesizing a target having particular physical properties such as boiling point, etc. Our hrst scheme is to build molecular weight by condensing polyols with fluoro-olellns such as TFE and HFP. These intermediates are then fluorinated by a simple solution phase. batch, photo-assisted direct fluorination to give high yields of isomerically pure perlluorinated ethers. In a second scheme we use ethylene oxide to fine-tune the molecular weight of the polyol. and the weight of these can be extended by reaction with an appropriate fluoro-oleti. These intermediates can be fluorinated using our batch fluorinator to make new pertluorinated ethers of a specific molecular weight and boiling point.

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Author

Allen C. Sievert; Walter R. Tong; Mario J. Nappa

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-1139)

Published

1991

Language

EN

Field

Chemistry (Physical Sciences)