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Polymers 2018, 10(1), 41;

High Temperature, Living Polymerization of Ethylene by a Sterically-Demanding Nickel(II) α-Diimine Catalyst

Department of Chemistry, University of Tennessee, Knoxville, TN 37996, USA
Author to whom correspondence should be addressed.
Received: 15 December 2017 / Revised: 27 December 2017 / Accepted: 27 December 2017 / Published: 2 January 2018
(This article belongs to the Special Issue Olefin Polymerization and Polyolefin)
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Catalysts that employ late transition-metals, namely Ni and Pd, have been extensively studied for olefin polymerizations, co-polymerizations, and for the synthesis of advanced polymeric structures, such as block co-polymers. Unfortunately, many of these catalysts often exhibit poor thermal stability and/or non-living polymerization behavior that limits their ability to access tailored polymer structures. Due to this, the development of catalysts that display controlled/living behavior at elevated temperatures is vital. In this manuscript, we describe a Ni α-diimine complex that is capable of polymerizing ethylene in a living manner at temperatures as high as 75 °C, which is one of the highest temperatures reported for the living polymerization of ethylene by a late transition metal-based catalyst. Furthermore, we will demonstrate that this catalyst’s living behavior is not dependent on the presence of monomer, and that it can be exploited to access polyethylene-based block co-polymers. View Full-Text
Keywords: polyethylene; living polymerization; nickel α-diimine; catalysis polyethylene; living polymerization; nickel α-diimine; catalysis

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Brown, L.A.; Anderson, W.C.; Mitchell, N.E.; Gmernicki, K.R.; Long, B.K. High Temperature, Living Polymerization of Ethylene by a Sterically-Demanding Nickel(II) α-Diimine Catalyst. Polymers 2018, 10, 41.

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