Editing Living polymerization (section)

===Living group-transfer polymerization===
'''Group-transfer polymerization''' also has characteristics of living polymerization.<ref>Davis, Fred J. (2004) ''Polymer chemistry: a practical approach''. Oxford University Press. {{ISBN|978-0-19-850309-5}} .</ref> It is applied to alkylated [[methacrylate]] monomers and the initiator is a [[silyl ketene acetal]]. New monomer adds to the initiator and to the active growing chain in a [[Michael reaction]]. With each addition of a monomer group the trimethylsilyl group is transferred to the end of the chain. The active [[chain-end]] is not ionic as in anionic or cationic polymerization but is covalent. The reaction can be catalysed by bifluorides and bioxyanions such as ''tris(dialkylamino)sulfonium bifluoride'' or ''tetrabutyl ammonium bibenzoate''. The method was discovered in 1983 by [[Owen Webster]]<ref>{{cite journal | last1 = Webster | first1 = O. W. | last2 = Hertler | first2 = W. R. | last3 = Sogah | first3 = D. Y. | last4 = Farnham | first4 = W. B. | last5 = RajanBabu | first5 = T. V. | year = 1983 | title = Group-transfer polymerization. 1. A new concept for addition polymerization with organosilicon initiators | journal = [[J. Am. Chem. Soc.]] | volume = 105 | issue = 17| pages = 5706–5708 | doi = 10.1021/ja00355a039}}</ref> and the name first suggested by [[Barry Trost]].