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人们发现在制备高效齐格勒—纳塔催化剂时,加入适量的给电子体化合物,可大大地改善催化剂的丙烯聚合定向能力和提高催化活性。最常用的、效果最佳的给电子体为芳香羧酸酯类化合物。然而,催化剂中存在给电子体对乙烯聚合过程的影响文献报道尚少。本文研究了以反应法制备的氯化镁为载体的钛系齐格勒-纳塔催化剂在有(或无)邻苯二甲酸二丁酯(DBP)存在时的组成、结构及其用于乙烯聚合动力学行为的差别。不加
It has been found that adding an appropriate amount of an electron donor compound in the preparation of an efficient Ziegler-Natta catalyst can greatly improve the propylene polymerization targeting ability and the catalytic activity of the catalyst. The most commonly used and best performing electron donors are aromatic carboxylic acid esters. However, there are few reports on the influence of electron donors on the polymerization of ethylene. In this paper, the composition, structure and catalytic activity of titanium-based Ziegler-Natta catalysts with and without dibutyl phthalate (DBP) supported on magnesium chloride prepared by reaction method were studied. Differences in learning behavior. do not add