1999年12月
High-yield synthesis of functionalized alkoxyamine initiators and approach to well-controlled block copolymers using them
MACROMOLECULES
- ,
- ,
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- 巻
- 32
- 号
- 25
- 開始ページ
- 8356
- 終了ページ
- 8362
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1021/ma9907542
- 出版者・発行元
- AMER CHEMICAL SOC
Reaction of ethylbenzene, 4-bromo-, 4-(ethoxycarbonyl)-, and 4-methoxyethylbenzenes with di-tert-butyl diperoxyoxalate at 35 degrees C in the presence of stable nitroxide radicals gave alkoxyamines in 50-91% yields. Lithiation of the 4-bromophenylalkoxyamine and subsequent treatment with DMF gave 4-formylphenylalkoxyamine in 95% yield, and the reduction of the 4-formylphenylalkoxyamine with NaBH(4) yielded 4-(hydroxymethyl)phenylalkoxyamine in 89% yield. Anionic polymerization of butadiene (BD) with sec-BuLi and subsequent termination with 4-formylphenylalkoxyamine gave an end-functionalized poly(butadiene) [poly(BD)]. "Living" radical polymerization of styrene (St) initiated by the functionalized poly(BD) at 120 degrees C gave a poly(BD)-block-poly(St) with a M(w)/M(n) of 1.30. Anionic polymerization of hexamethylcyclotrisiloxane (D(3)) with 4-lithiophenylalkoxyamine gave poly(D(3)) with an alkoxyamine moiety at a polymer end. "Living" radical polymerization of St initiated by the functionalized poly(D(3)) gave poly(D(3))-block-poly(St) with M(w)/M(n)'s of 1.73-1.80.
- リンク情報
- ID情報
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- DOI : 10.1021/ma9907542
- ISSN : 0024-9297
- CiNii Articles ID : 80011479621
- Web of Science ID : WOS:000084329300020