Ziegler-Natta catalyst

Japanese: Ziegler-Natta catalyst(英語表記)ZieglerNattacatalyst
Ziegler-Natta catalyst

…While investigating the effects of compounds of various transition metals other than nickel, it was found that the polymerization of ethylene was easily induced by a mixture of triethylaluminum and titanium tetrachloride. This discovery was expanded by Italian G. Natta, who found that propylene, which had previously been considered very difficult to polymerize, could be easily polymerized by a similar catalyst, triethylaluminum-titanium trichloride system (Ziegler-Natta catalyst). In particular, it was found that the polypropylene obtained by this polymerization reaction had a very regular molecular structure, and this opened up a new field that had not existed until then: the reaction that produces such a polymer (called a stereoregular polymer), that is, stereospecific polymerization. …

*Some of the terms mentioned in "Ziegler-Natta catalyst" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ニッケル以外の種々の遷移金属の化合物の効果を検討したなかで,トリエチルアルミニウムと四塩化チタンの混合系によってエチレンの重合が容易に起こることがわかったのである。 この発見はイタリアのG.ナッタによって発展させられ,それまで非常に重合しにくいとされていたプロピレンが,類似の触媒であるトリエチルアルミニウム‐三塩化チタン系(チーグラー=ナッタ触媒Ziegler‐Natta catalyst)によって容易に重合することがわかった。とくに,この重合反応で得られるポリプロピレンは立体的にきわめて規則正しい分子構造をもつことがわかり,そのようなポリマー(重合体)――立体規則性ポリマーという――を与える反応,すなわち立体特異性重合という,それまでになかった新分野がひらかれた。…

※「Ziegler-Natta catalyst」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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