Half-titanocene complexes bearing dianionic 6-benzimidazolylpyridyl-2-carboximidate ligands: Synthesis, characterization, and their ethylene polymerization
文献类型：期刊论文
| 作者 | Zuo, Weiwei; Zhang, Shu; Liu, Shaofeng; Liu, Xijie; Sun, Wen-Hua1
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| 刊名 | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
 |
| 出版日期 | 2008-05-15 |
| 卷号 | 46期号:10页码:3396-3410 |
| 关键词 | Catalysts Oxo-bridged Dimeric Complexes Polyethylene (Pe) Ziegler-natta Polymerization |
| ISSN号 | 0887-624X |
| DOI | 10.1002/pola.22693 |
| 英文摘要 | 6-Benzimidazolylpyridyl-2-carboximidic half-titanocene complexes, Cp'TiLCl (CP' C5H5, MeC5H4, C5Me5, L = 6-benzimidazolylpyridine-2-carboxylimidic, C1-C13), were synthesized and characterized along with single-crystal X-ray diffraction. The half-titanocene chlorides containing substituted cyclopentadienyl groups, especially pentamethylcyclopentadienyl groups were more stable, while those without substituents on the cyclopentadienyl groups were easily transformed into their dimeric oxo-bridged complexes, (CpTiL)(2)O (C14 and C15). In the presence of excessive amounts of methylaluminoxane (MAO) or modified methylaluminoxane (MMAO), all half-titanocene complexes showed high catalytic activities for ethylene polymerization. The substituents on the Cp groups affected the catalytic behaviors of the complexes significantly, with less substituents favoring increased activities and higher molecular weights of the resultant polyethylenes. Effects of reaction conditions on catalytic behaviors were systematically investigated with catalytic systems of mononuclear C1 and dimeric C14. With C1/MAO, large MAO amount significantly increases the catalytic activity, while the temperature only has a slight effect on the productivity. In the case of C14/MAO catalytic system, temperature above 60 degrees C and AIM value higher than 5000 were necessary to observe good catalytic activities. In both systems, higher reaction temperature and low cocatalyst amount gave the polyethylenes with higher molecular weights. (C) 2008 Wiley Periodicals, Inc. |
| 语种 | 英语 |
| WOS记录号 | WOS:000256028600022 |
| 出版者 | JOHN WILEY & SONS INC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/63069]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Sun, Wen-Hua |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Engn Plast, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zuo, Weiwei,Zhang, Shu,Liu, Shaofeng,et al. Half-titanocene complexes bearing dianionic 6-benzimidazolylpyridyl-2-carboximidate ligands: Synthesis, characterization, and their ethylene polymerization[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2008,46(10):3396-3410. |
| APA | Zuo, Weiwei,Zhang, Shu,Liu, Shaofeng,Liu, Xijie,&Sun, Wen-Hua.(2008).Half-titanocene complexes bearing dianionic 6-benzimidazolylpyridyl-2-carboximidate ligands: Synthesis, characterization, and their ethylene polymerization.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,46(10),3396-3410. |
| MLA | Zuo, Weiwei,et al."Half-titanocene complexes bearing dianionic 6-benzimidazolylpyridyl-2-carboximidate ligands: Synthesis, characterization, and their ethylene polymerization".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 46.10(2008):3396-3410. |
入库方式： OAI收割
来源：化学研究所
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