Shingo Kobayashi, T. Matsuzawa, S. Matsuoka
Aug 3, 2006
Citations
0
Influential Citations
34
Citations
Journal
Macromolecules
Abstract
Anionic polymerizations of new styrene derivatives, 4-(1-adamantyl)styrene (1) and 3-(4-vinylphenyl)-1,1‘-biadamantane (2), were carried out with sec-butyllithium, cumylpotassium, and lithium- or potassium naphthalenide in THF at −78 °C for 3−4 h. The polymerizations of 1 and 2 quantitatively proceeded to afford the polymers possessing the predicted molecular weights based on the molar ratios between monomers and initiators and the narrow molecular weight distributions (Mw/Mn = 1.03−1.13). The stability of propagating chain ends of poly(1) and poly(2) was confirmed by the quantitative initiation efficiency in the sequential copolymerization of 1 and 2 with styrene or isoprene. Novel well-defined block copolymers, poly(1)-b-polystyrene, poly(1)-b-polyisoprene, poly(1)-b-polyisoprene-b-poly(1), poly(2)-b-polystyrene, and poly(2)-b-polyisoprene-b-poly(2), were anionically synthesized. The resulting poly(1) and poly(2) started to decompose over 340 °C and showed remarkably high glass transition temperatures (...