Ethylene Homopolymerizaton and Copolymerizaton by Vanadium(III) Complexes Containing Tridentate or Tetradentate Iminopyrrolyl Ligands
文献类型：期刊论文
| 作者 | Mu, Jing-Shan; Shi, Xin-Cui; Li, Yue-Sheng |
| 刊名 | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
 |
| 出版日期 | 2011-06-15 |
| 卷号 | 49期号:12页码:2700-2708 |
| 关键词 | Homogenous Catalysis Polyolefins Ziegler-natta Polymerization |
| ISSN号 | 0887-624X |
| DOI | 10.1002/pola.24702 |
| 英文摘要 | Iminopyrrolyl vanadium(III) complexes 2a-b bearing tridentate ligands [C(4)H(3)NCH=NC(6)H(4)L]VCl(2)(THF)[L = 2-P(C(6)H(5))(2) (2a), 2-SMe (2b)] and complexes 2c-d with tetradentate ligands [(C(4)H(3)NCH = N)(2)R]VCl(THF) [R = 1,2-C(6)H(4) (2c), 1,2-C(2)H(4) (2d)] have been synthesized in high yields. With diethylaluminium chloride as a cocatalyst, complexes 2a-d were investigated as efficient catalysts for ethylene polymerization under various reaction conditions, and exhibited high catalytic activity and remarkable thermal stability. With these complexes, high molecular weight polymers with unimodal molecular weight distributions were obtained, indicating that the polymerization reaction took place in a single-site nature. Ethylene/1-hexene copolymerizations were also investigated in the presence of Et(2)AlCl. Both increasing ligand denticity and introducing softer atom into the sidearm of the ligands significantly influenced catalytic activity, comonomer incorporation, and the molecular weights of the resultant polymers, suggesting that both the steric and the electronic effects of the ligands played an important role in adjusting chain propagation and transfer rate. The chain transfer mechanisms involved in the copolymerization process were investigated by carefully analyzing the microstructure of the copolymers. The signals of vinyl, disubstituted and tri-substituted vinylene double bond end groups were detected in the copolymer obtained by 2a/Et(2)AlCl system but not in those by 2b-c/Et(2)AlCl systems, indicating that bulky electron- donating group, AP(C(6)H(5))(2), may lead to those unusual transfer reactions. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 2700-2708, 2011 |
| 语种 | 英语 |
| WOS记录号 | WOS:000290760100019 |
| 出版者 | WILEY-BLACKWELL |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/72405]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Li, Yue-Sheng |
| 作者单位 | Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mu, Jing-Shan,Shi, Xin-Cui,Li, Yue-Sheng. Ethylene Homopolymerizaton and Copolymerizaton by Vanadium(III) Complexes Containing Tridentate or Tetradentate Iminopyrrolyl Ligands[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2011,49(12):2700-2708. |
| APA | Mu, Jing-Shan,Shi, Xin-Cui,&Li, Yue-Sheng.(2011).Ethylene Homopolymerizaton and Copolymerizaton by Vanadium(III) Complexes Containing Tridentate or Tetradentate Iminopyrrolyl Ligands.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,49(12),2700-2708. |
| MLA | Mu, Jing-Shan,et al."Ethylene Homopolymerizaton and Copolymerizaton by Vanadium(III) Complexes Containing Tridentate or Tetradentate Iminopyrrolyl Ligands".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 49.12(2011):2700-2708. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。