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Activation and Deactivation of Phillips Catalyst for Ethylene Polymerization Using Various Activators
Author(s) -
Zeng Yanning,
Chammingkwan Patchanee,
Baba Ryuki,
Taniike Toshiaki,
Terano Minoru
Publication year - 2017
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.201600046
Subject(s) - alkyl , catalysis , ethylene , chemistry , polymerization , polymer chemistry , phenol , chain transfer , aluminium , photochemistry , organic chemistry , polymer , radical polymerization
The present article reveals important roles of metal alkyl activators in tuning the performance of the Phillips catalyst in ethylene polymerization. The addition of aluminum alkyl aids the activation of the catalyst, while excess addition leads to the loss of the activity. The balance between the activation and deactivation depends on the type of employed aluminum alkyl, and tri‐ n ‐octylaluminum offers the most efficient catalyst usage by preferentially suppressing the deactivation. The passivation of aluminum trialkyl with a hindered phenol mildens not only the deactivation but also chain transfer reactions, leading to an increment of high molecular weight fractions.