POLYPHENYLENESULFONES BY FRIEDEL-CRAFTS TYPE POLYCONDENSATIONS
Abstract
Homocondensation of benzenesulfonylchloride and cocondensation of aromatic disulfonylchlorides with diphenyl, diphenylether and diphenylcarbonate under Friedel-Crafts conditions resulted in polymers with inherent viscosities up to 0.11 and molecular weights probably in the range of 3000-4000. The polymers are low melting, tan to black powders, soluble in dimethylformamide and tetrahydrofuran. TGA indicates a wide molecular weight distribution. The sulfur content is lower than expected for a 1:1 copolymer; under the reaction conditions used, homocondensation of the aromatic hydrocarbon component could have occurred, according to a cationic oxidative mechanism. It is also possible (and known) that the aromatic disulfonylchlorides, under pyrolysis conditions, condense with evolution of sulfurdioxide and hydrogen chloride. At least 50 percent of the sulfur content of the polymers is present in the form of pending sulfonylchloride (in one case: sulfonic acid) groups. The polymers can be considered as copolyphenylenes-polyphenylene sulfones with pending sulfonlychloride groups.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1966
- Accession Number
- AD0800375
Entities
People
- Gerhard F. Ehlers
- Robert L. Buchenauer
Organizations
- Air Force Research Laboratory