A simple and versatile nickel platform for the generation of branched high molecular weight polyolefins
A simple and versatile nickel platform for the generation of branched high molecular weight polyolefins
复制标题
用于生成支化高分子量聚烯烃的简单且多功能的镍平台
DOI：
10.1038/s41467-019-14211-0
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发表时间：
2020-01-17
影响因子：
16.6
通讯作者：
Chen, Changle
中科院分区：
文献类型：
--
作者：
Liang, Tao;Goudari, Shabnam B.;Chen, Changle
高性能过渡金属催化剂的开发长期以来一直是学术和工业聚烯烃研究的主要推动力。后过渡金属基烯烃聚合催化剂具有许多独特的性质，例如仅使用乙烯作为原料产生各种支化聚烯烃的能力和在没有保护剂的情况下掺入极性官能化共聚单体的能力。在这里，我们报告的合成和（共）聚合研究的一个简单的，但非常通用的α-亚氨基酮镍系统。该催化剂合成简单、易改性、热稳定性好、不需添加任何助催化剂就具有较高的催化活性。尽管具有空间开放性，但这些催化剂可以产生支化的超高分子量聚乙烯并使乙烯与一系列极性共聚单体共聚。通过双核镍催化剂的合成和用于催化剂异质化的锚的安装，进一步证明了该平台的多功能性。
The development of high-performance transition metal catalysts has long been a major driving force in academic and industrial polyolefin research. Late transition metal-based olefin polymerization catalysts possess many unique properties, such as the ability to generate variously branched polyolefins using only ethylene as the feedstock and the capability of incorporating polar functionalized comonomers without protecting agents. Here we report the synthesis and (co)polymerization studies of a simple but extremely versatile alpha-imino-ketone nickel system. This type of catalyst is easy to synthesize and modify, and it is thermally stable and highly active during ethylene polymerization without the addition of any cocatalysts. Despite the sterically open nature, these catalysts can generate branched Ultra-High-Molecular-Weight polyethylene and copolymerize ethylene with a series of polar comonomers. The versatility of this platform has been further demonstrated through the synthesis of a dinuclear nickel catalyst and the installation of an anchor for catalyst heterogenization.