From polyethylene waxes to HDPE using an alpha,alpha '-bis(arylimino)-2,3:5,6-bis(pentamethylene)pyridyl-chromium(III) chloride pre-catalyst in ethylene polymerisation | |
Department | OSSO国家重点实验室 |
Huang, Chuanbing1,2; Du, Shizhen1,2; Gregory A. Solan1,3; Sun, Yang1; Sun WH(孙文华)1,2,4; Sun WH(孙文华) | |
2017 | |
Source Publication | Dalton Transactions |
ISSN | 1477-9226 |
Volume | 46Issue:21Pages:6948-6957 |
Abstract | Five examples of α,α′-bis(arylimino)-2,3:5,6-bis(pentamethylene)pyridyl-chromium(III) chlorides (aryl = 2,6-Me2Ph Cr1, 2,6-Et2Ph Cr2, 2,6-i-Pr2Ph Cr3, 2,4,6-Me3Ph Cr4, 2,6-Et2-4-MePh Cr5) have been synthesized by the one-pot template reaction of α,α′-dioxo-2,3:5,6-bis(pentamethylene)pyridine, CrCl3·6H2O and the corresponding aniline. The molecular structures of Cr1 and Cr4 reveal distorted octahedral geometries with the N,N,N-ligand adopting a mer-configuration. On activation with an aluminium alkyl co-catalyst, Cr1–Cr5 exhibited high catalytic activities in ethylene polymerization and showed outstanding thermal stability operating effectively at 80 °C with activities up to 1.49 × 107 g of PE (mol of Cr)−1 h−1. Significantly, the nature of the co-catalyst employed had a dramatic effect on the molecular weight of the polymeric material obtained. For example, using diethylaluminium chloride (Et2AlCl) in combination with Cr4 gave high density/high molecular weight polyethylene with broad molecular weight distributions (30.9–39.3). By contrast, using modified methylaluminoxane (MMAO), strictly linear polyethylene waxes of lower molecular weight and narrow molecular weight distribution (1.6–2.0) were obtained with vinyl end-groups. |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1039/c7dt01077j |
Funding Organization | the National Natural Science Foundation of China (no. U1362204;21374123);G. A. S. thanks the Chinese Academy of Sciences for a Visiting Scientist Fellowship |
Indexed By | SCI |
If | 4.029 |
Language | 英语 |
compositor | 第四作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/21966 |
Collection | 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Gregory A. Solan; Sun WH(孙文华) |
Affiliation | 1.Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China 2.CAS Research/Education Center for Excellence in Molecular Sciences, University of Chinese Academy of Sciences, Beijing 100049, China 3.Department of Chemistry, University of Leicester, University Road, Leicester LE1 7RH, UK 4.State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
Recommended Citation GB/T 7714 | Huang, Chuanbing,Du, Shizhen,Gregory A. Solan,et al. From polyethylene waxes to HDPE using an alpha,alpha '-bis(arylimino)-2,3:5,6-bis(pentamethylene)pyridyl-chromium(III) chloride pre-catalyst in ethylene polymerisation[J]. Dalton Transactions,2017,46(21):6948-6957. |
APA | Huang, Chuanbing,Du, Shizhen,Gregory A. Solan,Sun, Yang,Sun WH,&孙文华.(2017).From polyethylene waxes to HDPE using an alpha,alpha '-bis(arylimino)-2,3:5,6-bis(pentamethylene)pyridyl-chromium(III) chloride pre-catalyst in ethylene polymerisation.Dalton Transactions,46(21),6948-6957. |
MLA | Huang, Chuanbing,et al."From polyethylene waxes to HDPE using an alpha,alpha '-bis(arylimino)-2,3:5,6-bis(pentamethylene)pyridyl-chromium(III) chloride pre-catalyst in ethylene polymerisation".Dalton Transactions 46.21(2017):6948-6957. |
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