Activity Enhancement of MgCl2-supported Ziegler-Natta Catalysts by Lewis-acid Pre-treatment for Ethylene Polymerization
Résumé
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 the Lewis acid only promoting the creation of new active sites, after activation by TEA, possessing very similar features than the original ones achievable with conventional precatalysts (i.e. without Lewis-acid treatment).
Fichier principal
Humbert et all Article CJPS - revised manuscript HAL.pdf (1022.81 Ko)
Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)