FLUORINATED POLYMERS AND FLUIDS
Abstract
The synthesis of difluoropyromellitic dianhydride, 2-2, 5-5, 6,6- hexafluoro-3-3- dihydroxybenzidine, 2-4-5- trifluororesorcinol, perfluoro-4- hydroxyphenyldimethyl- carbinol and tetrafluorobenzene-1-3-dithiol has been investigated. These and other compounds were employed in the synthesis of fluorinated aromatic model compounds and polymers. A low molecular weight perfluoro polycarbonate, a low molecular weight fluorine-containing co- polycarbonate and a fluorine-containing aromatic polyimide had higher thermo- oxidative stability than the corresponding hydrogenic polymers. Other fluorinated polycarbonates, polyimides, and a poly(1-3-4-oxadiazole) had lower thermo-oxidative stabilities. A perfluoro poly(bibenzoxazole) could not be prepared. The reaction between pentafluorobenzene sulphonyl chloride and perfluoro-aromatics suggests new routes to fluorine-containing polymers. Synthesis routes to perfluoro aralkyl compounds, with potential as thermo- oxidatively stable fluids are being investigated. Perfluoro alicyclic compounds of moderately high thermal stability have been prepared. Perfluorinated heterocyclics have been synthesised. The thermal decomposition points of two heterocyclic ethers and an ester are also reported.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1967
- Accession Number
- AD0813459
Entities
People
- A. K. Barbour
- E. R. Lynch
- K. N. Ayad
- M. W. Buxton
- S. A. Evans
Organizations
- Monsanto