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Ethylene Polymerization by the New Chromium Catalysts Based on Amino-Pyrrolide Ligands
He, Li-Peng1,2; Liu, Jing-Yu1; Pan, Li1; Wu, Ji-Qian1,2; Xu, Bao-Chang1,2; Li, Yue-Sheng1
2009-02-01
Source PublicationJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
ISSN0887-624X
Volume47Issue:3Pages:713-721
AbstractA series of amino-pyrrolide ligands (1-4a) and their derivatives aminothiophene ligand (5a), amino-indole ligand (6a) were prepared. Chromium catalysts, which were generated in situ by mixing the ligands with CrCl(3)(thf)(3) in toluene, were tested for ethylene polymerization. The preliminary screening results revealed that the tridentate amino-pyrrolide ligands containing soft pendant donor, 3a, 4a/CrCl(3)(thf)(3) systems displayed high catalytic activities towards ethylene polymerization in the presence of modified methyaluminoxane. The electronic and steric factors attached to the ligand backbone significantly affected both the catalyst activity and the polymer molecular weight. Complex 4b was obtained by the reaction of CrCl(3)(thf)(3) with one equivalent of the lithium salts of 4a, which was the most efficient ligand among the tested ones. The effect of polymerization parameters such as cocatalyst concentration, ethylene pressure, reaction temperature, and time on polymerization behavior were investigated in detail. The resulting polymer obtained by 4b display wax-like and possess linear structure, low molecular weight, and unimodal distribution. (C) 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 713721,2009
KeywordCatalysis Polyolefins Ziegler-natta Polymerization
DOI10.1002/pola.23182
Indexed BySCI
Language英语
WOS IDWOS:000262931800019
PublisherWILEY-BLACKWELL
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/68290
Collection中国科学院化学研究所
Corresponding AuthorLi, Yue-Sheng
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Grad Sch, Changchun Branch, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
He, Li-Peng,Liu, Jing-Yu,Pan, Li,et al. Ethylene Polymerization by the New Chromium Catalysts Based on Amino-Pyrrolide Ligands[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2009,47(3):713-721.
APA He, Li-Peng,Liu, Jing-Yu,Pan, Li,Wu, Ji-Qian,Xu, Bao-Chang,&Li, Yue-Sheng.(2009).Ethylene Polymerization by the New Chromium Catalysts Based on Amino-Pyrrolide Ligands.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,47(3),713-721.
MLA He, Li-Peng,et al."Ethylene Polymerization by the New Chromium Catalysts Based on Amino-Pyrrolide Ligands".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 47.3(2009):713-721.
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