Tapered block copolymers containing ethylene and a functionalized comonomer

Steve J. Diamanti, Vikram Khanna, Atsushi Hotta, Robert C. Coffin, Diane Yamakawa, Edward J. Kramer, Glenn H. Fredrickson, Guillermo C. Bazan

研究成果: Article査読

37 被引用数 (Scopus)

抄録

We report the synthesis of tapered block copolymers of ethylene with 5-norbomen-2-yl acetate (1) by the nickel catalyst system [N-(2,6- diisopropylphenyl)-2-(2,6-diisopropylphenylimino)propanamide] Ni-η 1-CH 2Ph)(PMe 3) (2) and Ni(COD) 2 (bis(1,4-cyclooctadiene)nickel). This technique utilizes a one-pot semibatch copolymerization in which ethylene is continuously added while 1 is depleted by incorporation into the polymer chain. The simplicity of this technique allows the construction of a polymer library, which enabled us to study the effect of polymer composition and chain length on solid-state morphology and mechanical and thermal properties. From these studies we were able to derive a profile relating the probability of 1 insertion vs degree of polymerization (X n). Under proper experimental conditions, these tapered polymers form ordered microphase-separated morphologies where the phase morphology is modulated by the polymer chain length. The percent crystallinity and storage modulus of the polymers were found to be chain length dependent.

本文言語English
ページ(範囲)3270-3274
ページ数5
ジャーナルMacromolecules
39
9
DOI
出版ステータスPublished - 2006 5月 2
外部発表はい

ASJC Scopus subject areas

  • 有機化学
  • ポリマーおよびプラスチック
  • 無機化学
  • 材料化学

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