Ultra-high molecular weight elastomeric polyethylene using an electronically and sterically enhanced nickel catalyst

	Ultra-high molecular weight elastomeric polyethylene using an electronically and sterically enhanced nickel catalyst
	Mahmood, Qaiser 1,2,3,4; Zeng, Yanning 1,2; Yue, Erlin 1,2; Solan, Gregory A.1,2,5; Liang, Tongling 1,2; Sun, Wen-Hua1,2,3,4,6
刊名	POLYMER CHEMISTRY
	2017-11-07
卷号	8 期号:41 页码:6416-6430
英文摘要	A collection of ten related 1,2-bis(imino) acenaphthene-nickel(II) halide complexes, [1-[2,6-{(C6H5)(2)CH}(2)-4-{C(CH3)(3)}-C6H2N]-2-(ArN)C2C10H6]NiX2 (X = Br: Ar = 2,6-Me2C6H3 Ni1, 2,6-Et2C6H3 Ni2, 2,6-(Pr2C6H3)-Pr-i Ni3, 2,4,6-Me3C6H2 Ni4, 2,6-Et-2-4-MeC6H2 Ni5) and (X = Cl: Ar = 2,6-Me2C6H3 Ni6, 2,6-Et2C6H3 Ni7, 2,6-(Pr2C6H3)-Pr-i Ni8, 2,4,6-Me3C6H2 Ni9, 2,6-Et-2-4-MeC6H2 Ni10), each bearing one sterically and electronically enhanced N-2,6-dibenzhydryl-4-t-butylphenyl group, have been prepared and fully characterized. The unsymmetrical nature of the chelating bis(imino) acenaphthene is confirmed in the paramagnetic H-1 NMR spectra for Ni1-Ni10, while the molecular structures of Ni1, Ni2 and Ni6 highlight the unequal steric protection of the nickel center imposed by their respective N, N-ligands. On activation with either Et2AlCl or MMAO, all the nickel complexes were highly active catalysts in ethylene polymerization [as high as 1.26 x 10(7) g of PE per mol of Ni per h] affording exceptionally high molecular weight (up to 3.1 x 10(6) g mol(-1)) hyper-branched polyethylene. Analysis of the mechanical properties reveals the ultra-high molecular weight polymers possess high tensile strength, excellent shape fixity and elastic recovery (up to 69%) as well as high elongation at break (epsilon(b) = 843.9%); such materials offer a promising alternative to current thermoplastic elastomers (TPEs).
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/41300]
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.Univ Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Beijing 100049, Peoples R China 4.Univ Chinese Acad Sci, Int Sch, Beijing 100049, Peoples R China 5.Univ Leicester, Dept Chem, Univ Rd, Leicester LE1 7RH, Leics, England 6.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Mahmood, Qaiser,Zeng, Yanning,Yue, Erlin,et al. Ultra-high molecular weight elastomeric polyethylene using an electronically and sterically enhanced nickel catalyst[J]. POLYMER CHEMISTRY,2017,8(41):6416-6430.
APA	Mahmood, Qaiser,Zeng, Yanning,Yue, Erlin,Solan, Gregory A.,Liang, Tongling,&Sun, Wen-Hua.(2017).Ultra-high molecular weight elastomeric polyethylene using an electronically and sterically enhanced nickel catalyst.POLYMER CHEMISTRY,8(41),6416-6430.
MLA	Mahmood, Qaiser,et al."Ultra-high molecular weight elastomeric polyethylene using an electronically and sterically enhanced nickel catalyst".POLYMER CHEMISTRY 8.41(2017):6416-6430.