Kinetic Study on Role of Ditelluride in Organotellurium-Mediated Living Radical Polymerization (TERP)
2007; American Chemical Society; Volume: 40; Issue: 6 Linguagem: Inglês
10.1021/ma0623385
ISSN1520-5835
AutoresYungwan Kwak, Miho Tezuka, Atsushi Goto, Takeshi Fukuda, Shigeru Yamago,
Tópico(s)Chemical Reactions and Mechanisms
ResumoThe role of dimethyl ditelluride (MeTe)2 for the organotellurium-mediated living radical polymerizations (TERPs) of styrene (St) and methyl methacrylate (MMA) was kinetically studied. For both St and MMA, there was a rapid reversible activation−deactivation process mediated by (MeTe)2, i.e., P−TeMe + MeTe• ⇄ P• + (MeTe)2: (MeTe)2 worked as an efficient deactivator of the propagating radical P•, and the radical MeTe• worked as a highly reactive activator of the dormant species P−TeMe. This rapid reversible process accounted for the dramatic improvement of the polydispersity controllability with the addition of even a small amount of (MeTe)2 for these polymerizations.
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