Synthesis of Various Branched Ultra-High-Molecular-Weight Polyethylenes Using Sterically Hindered Acenaphthene-Based α-Diimine Ni(II) Catalysts

被引：105

作者：

Guo, Lihua ^{[1
]}

Lian, Kunbo ^{[2
]}

Kong, Wenyu ^{[1
]}

Xu, Shuai ^{[1
]}

Jiang, Guorun ^{[2
]}

Dai, Shengyu ^{[2
]}

机构：

[1] Qufu Normal Univ, Sch Chem & Chem Engn, Qufu 273165, Peoples R China

[2] Univ Sci & Technol China, Chinese Acad Sci, Key Lab Soft Matter Chem, Dept Polymer Sci & Engn, Hefei 230026, Anhui, Peoples R China

来源：

ORGANOMETALLICS | 2018年 / 37卷 / 15期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

TEMPERATURE ETHYLENE POLYMERIZATION; OLEFIN POLYMERIZATION; NICKEL-CATALYST; CHAIN-WALKING; LIVING POLYMERIZATION; METHYL ACRYLATE; METAL CATALYSTS; POLAR MONOMERS; COPOLYMERIZATION; PALLADIUM;

D O I：

10.1021/acs.organomet.8b00275

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of highly sterically hindered acenaphthene-based alpha-diimine nickel complexes with the remote R group in 4-position of diarylmethyl moiety have been synthesized and characterized. Activated with Et2AlCl, ethylene polymerization by these nickel complexes is investigated in detail, involving the remote substituent effect and influence of polymerization temperature on catalyst activity, thermal stability, polymer molecular weight, and branching density. These thermostable nickel catalysts are very active (up to 5.1 X 10(6) g.mol-(1)h(-1)) for ethylene polymerization and capable of producing various moderate to highly branched (26-71/1000 C) ultra-high-molecular-weight polyethylenes (UHMWPEs, Mw up to 4.5 X 10(6) g.mol(-1)). These polymeric materials with such unique structure show properties characteristic of thermoplastic elastomers, i.e., good elastomeric recovery and high strain at break.

引用

页码：2442 / 2449

页数：8

共 69 条

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