Mechanically linked polycarbonate.
(2003) Journal of the American chemical society — Vol. 125, n° 8, p. 2200-2207 (2003)
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- Authors
Bailly, Christian 
- Abstract
- The synthesis, by solid-state copolymerization, and characterization of the first polycatenanes based on a commercial polymer are reported. Various amounts of a benzylic amide [2]catenane, the corresponding macrocycle, and a rigid bisphenol fluorene derivative have been quantitatively and homogeneously incorporated into bisphenol A polycarbonate. The resulting copolymers were characterized by size exclusion chromatography coupled with viscosimetry, (1)H NMR, differential scanning calorimetry, and dynamic mechanical analysis. The unexpectedly small influence of [2]catenane incorporation on the glass transition temperature of the copolymers points to remarkable internal mobility of the catenane comonomer rings. A new relaxation linked to the flexible catenane units is also observed. The studies represent a detailed structural characterization of a polymer containing small amounts of mechanical linkages in its backbone and demonstrate that significant effects can be induced by doping conventional polymers with small percentages (2-6% of repeat units) of flexible catenanes.
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Citations
Fustin, C.-A., Bailly, C., Clarkson, G. J., De Groote, P., Galow, T. H., Leigh, D. A., Robertson, D., Slawin, A. M. Z., & Wong, J. K. Y. (2003). Mechanically linked polycarbonate. Journal of the American chemical society, 125(8), 2200-2207. https://doi.org/10.1021/ja0292546 (Original work published 2003)