Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1328367 | Journal of Organometallic Chemistry | 2007 | 7 Pages |
The anionic polymerization of methyl methacrylate (MMA) was initiated with a mixture of lithium amide of various secondary amines and nBuLi in the presence of YCl3, where an Y-ate complex was formed and an amide ligand on Y attacked MMA nucleophilically. In THF at −78 °C, PMMAs with narrow molecular weight distributions were obtained in high yields. The presence of a secondary amino group derived from the initiator at the polymer chain end was confirmed by MALDI-TOF-MS analyses. The initiating system using indoline as a secondary amine was effective for block copolymerization of MMA with tert-butyl acrylate (tBA), giving poly(MMA-b-tBA)s with narrow molecular weight distributions.
Graphical abstractThe anionic polymerization of methyl methacrylate (MMA) was initiated with a mixture of lithium amide of various secondary amines and nBuLi in the presence of YCl3. The resulting PMMAs had very narrow molecular weight distributions, having an amino group at their α-chain ends.Figure optionsDownload full-size imageDownload as PowerPoint slide