A. Hirao, Yashuhiro Hiraishi, S. Nakahama
Jan 27, 1998
Citations
0
Influential Citations
26
Citations
Journal
Macromolecules
Abstract
Four 2-[(N,N-dialkylamino)silyl] substituted 1,3-butadiene derivatives, 2-[(N,N-diethylamino)dimethylsilyl]-1,3-butadiene (1), 2-[(N,N-dibutylamino)dimethylsilyl]-1,3-butadiene (2), 2-[(1-pyrrolidinyl)dimethylsilyl]-1,3-butadiene (3), and 2-[[N-[2‘-(N‘,N‘-dimethylamino)ethyl]-N-methylamino]dimethylsilyl]-1,3-butadiene (4), were newly synthesized and polymerized under various conditions of anionic polymerization. Under the condition of THF at −78 °C, all the monomers, 1−4, underwent living polymerization to afford the polymers of predictable molecular weights and narrow molecular weight distributions. On the other hand, side reactions occurred to some extent in the polymerizations of 1−4 carried out in heptane at 40 °C, although yields of polymers were quantitative in all cases within 1 h. The polymers obtained in THF consisted mainly of 1,4 (83−91%) and 1,2 (9−17%) linkages, while all the polymers obtained in heptane were structurally pure 1,4-addition products. There were mixtures of 1,4-E (16−32%) and 1...