Nathaniel T. Rebeck, D. Knauss
Aug 11, 2011
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0
Influential Citations
14
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Journal
Macromolecules
Abstract
Poly(aryl ether sulfonamide)s were produced utilizing the sulfonamide moiety as a new activating group for nucleophlic aromatic substitution polymerization. The activated monomer, 2,4-difluoro-N,N-dimethylbenzenesulfonamide, was synthesized in high yields through a simple substitution reaction between 2,4-difluorobenzenesulfonyl chloride and dimethyl amine. The reactivity of this monomer in a nucleophilic aromatic substitution mechanism was estimated using semiempirical calculations at the PM3 level, as well as by 1H, 13C and 19F NMR spectroscopy. The data support the sulfonamide as sufficiently electron-withdrawing to activate aryl fluorides for substitution by phenoxide nucleophiles. Model reactions with tert-butylphenol confirm that the aryl fluorides of 2,4-difluoro-N,N-dimethylbenzenesulfonamide can be displaced in quantitative yields and suggest the process is suitable for forming polymers. A variety of novel polymers were produced employing bisphenol A, 4,4′-biphenol, bisphenol AF and hydroquinone ...