Examples of anionically polymerizable monomers include vinyl aromatic monomers such as styrene, alkyl substituted styrene and divinyl benzene, diphenylethylene, conjugated dienes such as isoprene and butadiene, N,N-disubstituted acrylamides and methacrylamides such as N,N-dimethylacrylamide, alkyl acrylates and methacrylates such as isodecyl methacrylate, glycidyl methacrylate and tert-butyl metha