Download Controlled/Living Radical Polymerization: Progress in ATRP by Krzysztof Matyjaszewski (Eds.) PDF

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The ESR spectrum of the butyl radical in benzene showed no change even at 80 °C. On the other hand, 57 the ESR spectrum of radicals formed at temperatures higher than 80 °C in decane indicate the presence of a mid-chain radical. These results suggest the occurrence of intermolecular chain transfer rather than intramolecular backbiting reaction in the case of alkyl radicals. Conclusions The development of ATRP provides an opportunity to prepare precursor molecules that can be used to investigate reaction mechanism of radicals in radical polymerizations.

A polysulfone with exo-methylene groups in the polymer backbone could be also prepared by the R-ROP of cyclic allylic disulfides followed by the oxidation (48). Cyclic disulfides and bicyclobutanes are radically polymerizable exceptional monomers without a double bond. Cyclic disulfides underwent the R-ROP by UV irradiation to give polysulfides (3, 49). Lipoamide, which is a five-membered cyclic sulfide, could undergo the copolymerization with common vinyl monomers such as styrene, vinyl acetate, acrylonitrile and MMA, whereas the homopolymerization could not be achieved (3).

Macromol. Chem. Phys. 2007, 208, 485-495. Zammit, M. ; Davis, T. ; Haddleton, D. ; Suddaby, K. G. Macromolecules 1997, 30, 1915-1920. Shortt, D. W. Journal of Liquid Chromatography & Related Technologies 1993, 16, 3371-3391. Clay, P. ; Gilbert, R. G. Macromolecules 1995, 28, 552-569. ; Gilbert, R. ; Olaj, O. ; Russell, G. ; Zifferer, G. Macromol. Chem. Phys. 2002, 203, 2570-2582. Cunningham, M. ; Mahabadi, H. K. Macromolecules 1996, 29, 835-841. ; Russell, G. T. Prog. Polym. Sci. 2009, in press (“Chain-length-dependent termination in radical polymerization: Subtle revolution in tackling a long-standing challenge”).

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