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首页> 外文期刊>Journal of Applied Polymer Science >Effect of diether as internal donor on MgCl2-supported Ziegler-Natta catalyst for propylene polymerization
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Effect of diether as internal donor on MgCl2-supported Ziegler-Natta catalyst for propylene polymerization

机译：二醚作为内给体对MgCl2负载的Ziegler-Natta丙烯聚合催化剂的影响

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This article demonstrates the influence of the molar ratio between diether as internal donor and Magnesium dichloride in processing of the catalyst preparation on the catalytic performance for propylene polymerization with MgCl2-supported Ziegler-Natta catalyst. The effect of electron donor on catalyst is investigated. The experimental data find that diether content on catalyst increases and Ti content on catalyst decreases with the increase of diether/Mg molar ratio. This result indicates that diether as internal donor is not coordinated to Ti species but to Mg species on catalyst. The introduction of diether remarkably improves the catalytic activity. The extents of improvement closely connect with diether/Mg molar ratio. The stereospecificity of catalyst intensively depends on the structure of diether as internal donor. The possible model of multi-active sites on heterogeneous Ziegler-Natta catalyst is proposed to explain these phenomena. (c) 2005 Wiley Periodicals, Inc.
机译：本文证明了在制备催化剂的过程中，作为内部供体的二醚与二氯化镁之间的摩尔比对MgCl2负载的Ziegler-Natta催化剂对丙烯聚合的催化性能的影响。研究了电子给体对催化剂的影响。实验数据发现，随着二醚/ Mg摩尔比的增加，催化剂上二醚含量增加，催化剂上Ti含量减少。该结果表明，作为内给体的二醚在催化剂上不与钛物种配位，而是与镁物种配位。引入二醚显着提高了催化活性。改善程度与二醚/镁的摩尔比密切相关。催化剂的立体定向性强烈取决于作为内部供体的二醚的结构。提出了多相齐格勒-纳塔催化剂上多活性位的可能模型来解释这些现象。 （c）2005年Wiley Periodicals，Inc.

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