抄録
A series of chiral, nickel α-diimine complexes featuring ligands based on bulky cumyl-substituted aniline moieties was synthesized. Each complex was capable of polymerizing propylene upon activation with methylaluminoxane (MAO). The catalysts were shown to be highly regioregular and isoselective for propylene polymerization at low temperature (e.g., -60 °C), whereas at higher reaction temperatures (e.g., 0 °C) the catalysts furnished regioirregular polypropylene (rirPP) composed of 1,2- and 3,1-enchainments. Many of the catalysts exhibited living behavior for propylene polymerization from -78 to 0 °C. From the screening results, the best catalyst was selected and used to produce regioblock polypropylenes featuring three or five blocks. Mechanical testing revealed that the materials exhibited good elastomeric behavior and improved performance at elevated temperatures (e.g., 65 °C) over block copolymers synthesized using a previously prepared chiral, nickel a-diimine catalyst
本文言語 | English |
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ページ(範囲) | 9548-9555 |
ページ数 | 8 |
ジャーナル | Macromolecules |
巻 | 41 |
号 | 24 |
DOI | |
出版ステータス | Published - 2008 12月 23 |
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