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FLUORINATED POLYMERS AND FLUIDS.

Author: E R LynchS A EvansK N AyadA K BarbourM W BuxtonAll authors
Publisher: Ft. Belvoir Defense Technical Information Center APR 1967.
Edition/Format:   Print book : EnglishView all editions and formats
Summary:
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  Read more...
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Details

Document Type: Book
All Authors / Contributors: E R Lynch; S A Evans; K N Ayad; A K Barbour; M W Buxton; MONSANTO RESEARCH CORP DAYTON OH.
OCLC Number: 227618109
Notes: See also AD-483 215.
Description: 239 pages

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.

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