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Activity Enhancement of MgCl2-supported Ziegler-Natta Catalysts by Lewis-acid Pre-treatment for Ethylene Polymerization

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Abstract

Ziegler-Natta precatalysts were synthetized from Lewis-base-modified-MgCl2 supports and treated by various Lewis acids, prior to activation by triethylaluminum, in order to increase their activity in ethylene polymerization. BCl3 provided the highest increase in activity. Interestingly, polymerization results showed no substantial modification of polymer properties, which is consistent with that Lewis acid only promotes the creation of new active sites, after activation by TEA, possessing very similar features to the original ones achievable with conventional precatalysts (i.e. without Lewis-acid treatment).

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Authors and Affiliations

  1. UMR 5265 Laboratoire de Chimie Catalyse Polymères et Procédés (C2P2), Université de Lyon, Univ. Lyon 1, CPE Lyon, CNRS, Bat 308F, 43 Bd du 11 novembre 1918, Villeurbanne, F-69616, France

    Matthieu Humbert, Sébastien Norsic, Jean Raynaud & Vincent Monteil

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  1. Matthieu Humbert
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  2. Sébastien Norsic
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  3. Jean Raynaud
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  4. Vincent Monteil
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Correspondence to Jean Raynaud or Vincent Monteil.

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Invited article for special issue of “The 100th Anniversary of the Birth of Prof. Shi-Lin Yang”

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Humbert, M., Norsic, S., Raynaud, J. et al. Activity Enhancement of MgCl2-supported Ziegler-Natta Catalysts by Lewis-acid Pre-treatment for Ethylene Polymerization. Chin J Polym Sci 37, 1031–1038 (2019). https://doi.org/10.1007/s10118-019-2335-8

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