Preparation of new perfluoro ether fluids exhibiting excellent thermal-oxidative stabilities

A series of low molecular weight perfluoroalkyl ethers (PFAEs) were synthesized by direct fluorination. Viscosity-temperature properties and oxidation stabilities were determined. Viscosity-temperature correlations indicated that increases in branching and increases in the size of the branching subs...

Full description

Saved in:
Bibliographic Details
Published in:Industrial & engineering chemistry research 1988-08, Vol.27 (8), p.1497-1502
Main Authors: Jones, William R, Bierschenk, Thomas R, Juhlke, Timothy J, Kawa, Hajimu, Lagow, Richard J
Format: Article
Language:English
Subjects:
Aliphatic compounds
Applied sciences
Chemical engineering
Chemistry
Chemistry And Materials (General)
Exact sciences and technology
Organic chemistry
Preparations and properties
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A series of low molecular weight perfluoroalkyl ethers (PFAEs) were synthesized by direct fluorination. Viscosity-temperature properties and oxidation stabilities were determined. Viscosity-temperature correlations indicated that increases in branching and increases in the size of the branching substituent caused a deterioration in viscometric properties (i.e., an increase in ASTM slope). In addition, increasing the ratio of carbon to oxygen in these compounds also increased the ASTM slope. Preliminary oxidation stability measurements indicated that highly branched PFAE fluids (i.e., those containing quaternary carbons) may be less stable than either those containing a single trifluoromethyl pendant group or those containing no branching at all.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie00080a024