期刊
POLYMER INTERNATIONAL
卷 68, 期 1, 页码 27-63出版社
WILEY
DOI: 10.1002/pi.5664
关键词
nitroxides; TEMPO; nitroxide radical coupling (NRC); post-polymerization modification; peroxide-initiated reactions
Post-polymerization modification is an attractive approach to extend applications and convert commodity plastics into products with new, desirable and tunable properties. Among the post-polymerization modification methods, the nitroxide radical coupling (NRC) reaction has been shown to be a convenient and versatile way to graft specific functionalities onto polymer chains and to control the onset and yield of polymer crosslinking during peroxide-initiated processes. The use of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and its derivatives as controllers of scorch in crosslinking and as functionalizers in functionalization reactions is thoroughly described. Examples are also given of graft polymerization from macroalkoxyamines generated by NRC and grafting of nitroxides by irradiation processes. In addition, in this review we attempt to demonstrate the broad applications of the NRC reaction in the preparation of polymers with a multitude of functionalities and elaborate architectures. The examples discussed here concern the use of atom transfer and single electron transfer NRC reactions to design a variety of polymers with asymmetrical structure and the use of the radical crossover reaction, based on the alkoxyamine dynamic covalent bond, to generate reversible polymer structures and switchable functional polymers. (c) 2018 Society of Chemical Industry
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