Tetrahedron p. 15225 - 15236 (1997)
Update date:2022-08-16
Topics:
Malmstroem, Eva
Miller, Robert D.
Hawker, Craig J.
Acylating agents have been identified as a new class of rate accelerating additives for nitroxide-mediated 'living' free radical polymerization. It is found that addition of 1 weight percent of acetic anhydride results in a significant decrease in the reaction time, 48 to 4 hours. This decrease in reaction time leads to greater control over the polymerization process with low polydispersity materials being obtained up to 150 000 a.m.u. A possible explanation for this effect is acylation of the alkoxyamine nitrogen leading to an increase in the lability of the C-ON bond.
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