Synthesis of atactic polypropylene: Propylene polymerization reactions with TiCl4–Al(C2H5)2Cl/Mg(C4H9)2 catalyst,Journal of Applied Polymer Science

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Synthesis of atactic polypropylene: Propylene polymerization reactions with TiCl4–Al(C2H5)2Cl/Mg(C4H9)2 catalyst
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2019-03-01 , DOI: 10.1002/app.47692
Laura А. Rishina ₁ , Yury V. Kissin ₂ , Svetlana S. Lalayan ₁ , Vadim G. Krasheninnikov ₁

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The Ziegler catalyst, a combination of TiCl₄ and Al(C₂H₅)₂Cl, is a very poor catalyst for propylene polymerization. However, the addition of Mg(C₄H₉)₂ to the Ziegler catalyst at a [Mg]:[Al] molar ratio < 0.5 leads to the formation of a potent catalyst system for homopolymerization of propylene. Polymers produced with the TiCl₄–Al(C₂H₅)₂Cl/Mg(C₄H₉)₂ catalyst are mostly atactic and amorphous, their minor partially crystalline isotactic components constitute merely 5–10% of the combined polymer material. Principal advantages of the TiCl₄–Al(C₂H₅)₂Cl/Mg(C₄H₉)₂ catalyst for the manufacture of atactic PP include high activity, low cost, and the ease of use: the catalyst is prepared in situ from three commercially available components. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47692.

中文翻译：

无规立构聚丙烯的合成：与TiCl4-Al（C2H5）2Cl / Mg（C4H9）2催化剂的丙烯聚合反应

齐格勒催化剂是TiCl ₄和Al（C ₂ H ₅）₂ Cl的组合，是用于丙烯聚合的非常差的催化剂。然而，以[Mg]：[Al]摩尔比＜0.5将Mg（C ₄ H ₉）₂加入到齐格勒催化剂中导致形成用于丙烯均聚的有效催化剂体系。用TiCl ₄ -Al（C ₂ H ₅）₂ Cl / Mg（C ₄ H ₉）₂生产的聚合物催化剂主要是无规和无定形的，其次要的部分结晶的全同立构成分仅占组合聚合物材料的5-10％。将TiCl的主要优点₄ -Al（C ₂ H ^ ₅）₂ CL / Mg的（C ₄ H ^ ₉）₂为无规立构的PP的制备催化剂包括活性高，成本低，并且便于使用：催化剂制备中从三个市售组件中就地获取。分级为4 +©2019 Wiley Periodicals，Inc.J.Appl。Polym。科学 2019，136，47692。

更新日期：2019-03-01

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