Ethylene/Propylene Copolymerization Over Three Conventional C-2-Symmetric Metallocene Catalysts: Correlation Between Catalyst Configuration and Copolymer Microstructure

doi:10.1002/app.32553

CORC > 化学研究所 > 中国科学院化学研究所

	Ethylene/Propylene Copolymerization Over Three Conventional C-2-Symmetric Metallocene Catalysts: Correlation Between Catalyst Configuration and Copolymer Microstructure
	Lu, Li 1,2; Niu, Hui 1; Dong, Jin-Yong 1; Zhao, Xutao 3; Hu, Xuteng 3
刊名	JOURNAL OF APPLIED POLYMER SCIENCE
	2010-12-15
卷号	118 期号:6 页码:3218-3226
关键词	Ethylene/propylene Copolymerization Copolymer Microstructure Metallocene Catalyst Catalyst Configuration Association
ISSN号	0021-8995
DOI	10.1002/app.32553
英文摘要	This work reports on a correlation between catalyst configuration and copolymer microstructure for ethylene/propylene (E/P) copolymerization using three conventional C-2-symmetric metallocene catalysts, namely, rac-Et(Ind)(2)ZrCl2 (EBI), rac-Me2Si(2-Me-4-Ph-Ind)(2)ZrCl2 (SiPh), and rac-CH2(3-tBu-Ind)(2)ZrCl2 (MBu), with MAO as a common cocatalyst. Copolymerization reactions were conducted in toluene at three different temperatures with varied E/P ratios. Some typically obtained copolymers were characterized in detail using C-13-NMR spectroscopy, by which triad distribution data were elaborated in a statistical method to determine the reactivity ratios (r(E) and r(P)) of the comonomers, which were also obtained by Fineman-Rose estimation. The production of alternating-like copolymers from EBI is attributed to the rapid interconversion between two conformation states of the active site, one of which favors the incorporation of propylene but the other one does not. Both SiPh and MBu are structurally more rigid and of larger dihedral angles than EBI; however, SiPh which owns open active site conformation tend to produce random copolymers at all studied temperatures, and for MBu, sterically hindered catalyst, block-like copolymers were obtained. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 118: 3218-3226, 2010
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000282840500012
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/70469]
专题	中国科学院化学研究所
通讯作者	Dong, Jin-Yong
作者单位	1.Chinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat, CAS Key Lab Engn Plast, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.PetroChina Co Ltd, Petrochem Res Inst, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Lu, Li,Niu, Hui,Dong, Jin-Yong,et al. Ethylene/Propylene Copolymerization Over Three Conventional C-2-Symmetric Metallocene Catalysts: Correlation Between Catalyst Configuration and Copolymer Microstructure[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2010,118(6):3218-3226.
APA	Lu, Li,Niu, Hui,Dong, Jin-Yong,Zhao, Xutao,&Hu, Xuteng.(2010).Ethylene/Propylene Copolymerization Over Three Conventional C-2-Symmetric Metallocene Catalysts: Correlation Between Catalyst Configuration and Copolymer Microstructure.JOURNAL OF APPLIED POLYMER SCIENCE,118(6),3218-3226.
MLA	Lu, Li,et al."Ethylene/Propylene Copolymerization Over Three Conventional C-2-Symmetric Metallocene Catalysts: Correlation Between Catalyst Configuration and Copolymer Microstructure".JOURNAL OF APPLIED POLYMER SCIENCE 118.6(2010):3218-3226.