Judiciously balancing steric and electronic influences on 2,3-diiminobutane-based Pd(II) complexes in nourishing polyethylene properties
文献类型：期刊论文
| 作者 | Zeng, Yanning1,2,3; Mahmood, Qaiser1,2,3; Liang, Tongling1,2; Sun, Wen-Hua1,2,3,4
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| 刊名 | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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| 出版日期 | 2017-10-01 |
| 卷号 | 55期号:19页码:3214-3222 |
| 关键词 | Cationic Polymerization Palladium Polyethylene Schiff Base |
| 英文摘要 | A new series of palladium complexes (Pd1-Pd5) ligated by symmetrical 2,3-diiminobutane derivatives, 2,3-bis[2,6-bis{bis(4-FC6H4)(2)CH}(2)-4-(alkyl)C6H2N]C4H6 (alkyl=Me L1, Et L2, Pr-i L3, Bu-t L4) and 2,3-bis[2,6-bis{bis(C6H5)(2)CH}(2)-4-{(CH3)(3)C}C6H2N]C4H6 L5, have been prepared and well characterized, and their catalytic scope toward ethylene polymerization have been investigated. Upon activation with MAO, all palladium complexes (Pd1-Pd5) exhibited good activities (up to 1.44 x 10(6) g (PE) mol(-1)(Pd) h(-1)) and produced higher molecular weight polyethylene in the range of 10(5) g mol(-1) with precise molecular weight distribution (M-w/M-n=1.37-1.77). One of the long-standing limiting features of the Brookhart type -diimine Pd(II) catalysts is that they produce highly branched (ca. 100/1000 C atoms) and totally amorphous polymer. Conversely, herein Pd5 produced polymers having dramatically lower branching number (28/1000) as well as improved melting temperature up to 73.1 degrees C showing well-controlled linear architecture, and very similar to polyethylene materials generated by early-transition-metal based catalysts. (c) 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 3214-3222 |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/39222]  |
| 专题 | 化学研究所_工程塑料实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, 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 3.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Gansu, Peoples R China 4.Univ Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zeng, Yanning,Mahmood, Qaiser,Liang, Tongling,et al. Judiciously balancing steric and electronic influences on 2,3-diiminobutane-based Pd(II) complexes in nourishing polyethylene properties[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2017,55(19):3214-3222. |
| APA | Zeng, Yanning,Mahmood, Qaiser,Liang, Tongling,&Sun, Wen-Hua.(2017).Judiciously balancing steric and electronic influences on 2,3-diiminobutane-based Pd(II) complexes in nourishing polyethylene properties.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,55(19),3214-3222. |
| MLA | Zeng, Yanning,et al."Judiciously balancing steric and electronic influences on 2,3-diiminobutane-based Pd(II) complexes in nourishing polyethylene properties".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 55.19(2017):3214-3222. |
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来源：化学研究所
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