Strictly linear polyethylene using Co-catalysts chelated by fused bis(arylimino)pyridines: Probing ortho-cycloalkyl ring-size effects on molecular weight

doi:10.1016/j.polymer.2018.06.066

	Strictly linear polyethylene using Co-catalysts chelated by fused bis(arylimino)pyridines: Probing ortho-cycloalkyl ring-size effects on molecular weight
	Suo, HY ; Oleynik, II ; Bariashir, C ; Oleynik, IV ; Wang, Z ; Solan, GA ; Ma, YP ; Liang, TL ; Sun, WH
刊名	POLYMER
	2018-08-01
卷号	149 页码:45-54
关键词	Linear polyethylene Ortho-cydoalkyl substituent Coordination polymerization
ISSN号	0032-3861
DOI	10.1016/j.polymer.2018.06.066
英文摘要	Six examples of alpha,alpha'-bis(arylimino)-2,3:5,6-bis(pentamethylene)pyridine-cobalt(11) chlorides, [2,3:5,6{C4H8C(NAr)}(2)C5HN]CoCl2 (Ar = 2-(C5H9)-6-MeC6H3 Col, 2-(C6FI11)-6-MeC6H3 Co2, 2-(C8H15)-6-MeC6H3 Co3, 2-(C5H9)-4,6-Me2C6H2 Co4, 2-(C6FI11)-4,6-Me2C6H2 Co5, 2-(C8H15)-4,6-Me2C6H2 Co6), containing N-aryl groups that differ in either the ring size of the ortho-cycloalkyl substituents or the para-R group (R=H, Me), have been synthesized using a one-pot template approach. The molecular structure of Col highlights the ring puckering of both the ortho-cyclopentyl substituents and the two pyridine -fused seven-membered rings; a square-based pyramidal geometry is conferred about the metal center. On activation with either methylaluminoxane (MAO) or modified MAO (MMAO), all six complexes afforded strictly linear polyethylene (all Tm's > 130 degrees C) with high molecular weight (Mw up to 64.3 kg mol(-1)). Furthermore, all precatalysts displayed high activities (up to 2 x 10(6)g PE mot(-1) (Co) h(-1)) at temperatures between 20 and 60 degrees C with the catalytic activities correlating with the type of ortho-cycloalkyl substituent: cyclohexyl (Co2, Co5) > cyclopentyl (Col, Co4) > cyclooctyl (Co6, Co3) for either R = H or Me. The narrow unimodal distributions of the resulting polymers are consistent with single-site active species for the catalysts. (C) 2018 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000439137100006
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/41965]
专题	化学研究所_工程塑料实验室
作者单位	1.Solan, GA 2.Sun, WH (reprint author), Chinese Acad Sci, Key Lab Engn Plast, Inst Chem, Beijing 100190, Peoples R China. 3.Solan, GA 4.Sun, WH (reprint author), Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China. 5.Oleynik, II (reprint author), NN Vorozhtsov Novosibirsk Inst Organ Chem, Pr Lavrentjeva 9, Novosibirsk 630090, Russia.
推荐引用方式 GB/T 7714	Suo, HY,Oleynik, II,Bariashir, C,et al. Strictly linear polyethylene using Co-catalysts chelated by fused bis(arylimino)pyridines: Probing ortho-cycloalkyl ring-size effects on molecular weight[J]. POLYMER,2018,149:45-54.
APA	Suo, HY.,Oleynik, II.,Bariashir, C.,Oleynik, IV.,Wang, Z.,...&Sun, WH.(2018).Strictly linear polyethylene using Co-catalysts chelated by fused bis(arylimino)pyridines: Probing ortho-cycloalkyl ring-size effects on molecular weight.POLYMER,149,45-54.
MLA	Suo, HY,et al."Strictly linear polyethylene using Co-catalysts chelated by fused bis(arylimino)pyridines: Probing ortho-cycloalkyl ring-size effects on molecular weight".POLYMER 149(2018):45-54.