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Synfacts 2009(7): 0740-0740  
DOI: 10.1055/s-0029-1217211
Synthesis of Materials and Unnatural Products
© Georg Thieme Verlag Stuttgart ˙ New York

Polymers with Exceptional Thermal and Oxidative Stability

Contributor(s): Timothy M. Swager, Jason R. Cox
M. J. Robb, D. M. Knauss*
Colorado School of Mines, Golden, USA
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Publication History

Publication Date:
22 June 2009 (online)

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Significance

The authors report the polymerization of 2,7-difluorothianthrene using nucleophilic aromatic substitution. The facile displacement of fluoride anions facilitates molecular number polymers ranging from 13,100 to 22,100 g/mol. The resulting polymers exhibit thermooxidative stability at temperatures up to 500 ˚C. The sulfur atoms para to the fluorines are thought to activate substitution of the fluorines by an electron-accepting mechanism.