caa a22 4500 467919496 CHVBK 20180406152912.0 cr unu---uuuuu 170328e20060701xx s 000 0 eng 10.1007/s00706-006-0493-1 doi (NATIONALLICENCE)springer-10.1007/s00706-006-0493-1 Living Anionic Polymerization of 4-(α-Alkylvinyl)styrene Derivatives [Elektronische Daten] [Akira Hirao, Takahiro Imai, Kenji Watanabe, Mayumi Hayashi, Kenji Sugiyama] Summary.: The anionic polymerization of four bis-functionalized styrene derivatives with α-alkylvinyl groups have been carried out in THF at −78°C with the initiator prepared from oligo(α-methylstyryl)lithium and potassium tert-butoxide. The four monomers herein used are 4-isopropenylstyrene (4), 3-isopropenylstyrene (5), 2-isopropenylstyrene (6), and 4-(α-isopropylvinyl)styrene (7). It was found that under such polymerization conditions, the vinyl groups of both 4 and 7 are selectively polymerized and the isopropenyl and α-isopropylvinyl groups remain completely intact to afford stable living anionic polymers. As expected, the resulting polymers possessed precisely controlled chain lengths and narrow molecular weight distributions. More importantly, they also possessed the pendant isopropenyl and α-isopropylvinyl group in each monomer unit possible for further modification. On the other hand, the anionic polymerization of either 5 or 6 proceeded more or less along with the unwanted side reactions leading to chain-branching, followed by cross-linking. The positional effect of isopropenyl group on the polymerization and the cause of possible side reactions were discussed. Springer-Verlag, 2006 Keywords. Anions nationallicence Alkenes nationallicence Block copolymerization nationallicence Carbanions nationallicence Controlled molecular weight nationallicence Hirao Akira Polymeric and Organic Materials Department, Tokyo Institute of Technology (TIT), Ohokayama, Meguro-ku, Tokyo, Japan aut Imai Takahiro Polymeric and Organic Materials Department, Tokyo Institute of Technology (TIT), Ohokayama, Meguro-ku, Tokyo, Japan aut Watanabe Kenji Polymeric and Organic Materials Department, Tokyo Institute of Technology (TIT), Ohokayama, Meguro-ku, Tokyo, Japan aut Hayashi Mayumi Petrochemicals Research Laboratory, Sumitomo Chemical Co., Ltd., 2-1, Kitasode, Sodegaura-city, Chiba Prefecture, Japan aut Sugiyama Kenji Polymeric and Organic Materials Department, Tokyo Institute of Technology (TIT), Ohokayama, Meguro-ku, Tokyo, Japan aut Monatshefte für Chemie / Chemical Monthly Springer-Verlag 137/7(2006-07-01), 855-867 0026-9247 137:7<855 2006 137 706 https://doi.org/10.1007/s00706-006-0493-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00706-006-0493-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hirao Akira Polymeric and Organic Materials Department, Tokyo Institute of Technology (TIT), Ohokayama, Meguro-ku, Tokyo, Japan aut NATIONALLICENCE 700 1- Imai Takahiro Polymeric and Organic Materials Department, Tokyo Institute of Technology (TIT), Ohokayama, Meguro-ku, Tokyo, Japan aut NATIONALLICENCE 700 1- Watanabe Kenji Polymeric and Organic Materials Department, Tokyo Institute of Technology (TIT), Ohokayama, Meguro-ku, Tokyo, Japan aut NATIONALLICENCE 700 1- Hayashi Mayumi Petrochemicals Research Laboratory, Sumitomo Chemical Co., Ltd., 2-1, Kitasode, Sodegaura-city, Chiba Prefecture, Japan aut NATIONALLICENCE 700 1- Sugiyama Kenji Polymeric and Organic Materials Department, Tokyo Institute of Technology (TIT), Ohokayama, Meguro-ku, Tokyo, Japan aut NATIONALLICENCE 773 0- Monatshefte für Chemie / Chemical Monthly Springer-Verlag 137/7(2006-07-01), 855-867 0026-9247 137:7<855 2006 137 706 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer