Judiciously balancing steric and electronic influences on 2,3-diiminobutane-based Pd(II) complexes in nourishing polyethylene properties

	Judiciously balancing steric and electronic influences on 2,3-diiminobutane-based Pd(II) complexes in nourishing polyethylene properties
	Zeng, Yanning 1,2,3; Mahmood, Qaiser 1,2,3; Liang, Tongling 1,2; Sun, Wen-Hua1,2,3,4
刊名	JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
	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
内容类型	期刊论文
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.