Controlled radical polymerizations (CRP) are of paramount importance to the field of polymer chemistry. Nitroxide mediated polymerization (NMP) is arguably the most mechanistically simple and elegant of the CRP methods. Key to the mechanism of NMP is a persistent nitroxide radical that reversibly caps the growing polymer chain-end.1 ?In addition to nitroxides, a number of other radicals have been employed as mediating species for polymerizations, including (arylazo)oxy, borinate, triazolinyl, and verdazyl. In seeking new persistent radicals, we identified the benzo-1,2,4-triazinyl (triazine) radical, which is highly stable in air.2 The modular synthesis of triazine-based unimolecular initiators and their utility in controlling radical polymerizations will be presented.(1) Hawker, C. J.; Bosman, A. W.; Harth, E. Chem. Rev. 2001 , 101, 3661-3688.(2) Blatter, H. M.; Lukaszewski, H. Tetrahedron Lett. 1968 , 9, 2701�2705.

Introducing new mediators for controlled radical polymerizations: Triazine-based unimolecular initiators

248th National Meeting (2014)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.