In situ copolymerization of ethylene to produce linear low-density polyethylene by Ti(OBu)(4)/AlEt3-MAO/SiO2/Et(Ind)(2)ZrCl2

doi:10.1002/app.21190

CORC > 化学研究所 > 中国科学院化学研究所

	In situ copolymerization of ethylene to produce linear low-density polyethylene by Ti(OBu)(4)/AlEt3-MAO/SiO2/Et(Ind)(2)ZrCl2
	Zhu, BC ; Guo, CY ; Liu, ZY ; Yin, YQ
刊名	JOURNAL OF APPLIED POLYMER SCIENCE
	2004-12-15
卷号	94 期号:6 页码:2451-2455
关键词	Copolymerization Polyethylene Linear
ISSN号	0021-8995
DOI	10.1002/app.21190
英文摘要	Linear low-density polyethylene (LLDPE) is produced in a reactor from single ethylene feed by combining Ti(OBu)(4)/AlEt3, capable of forming alpha-olefins (predominantly 1-butene), with SiO2-supported Et(Ind)(2)ZrCl2 (denoted MAO/SiO2/Et(lnd)(2)ZrCl2), which is able to copolymerize ethylene and 1-butene in situ with little interference in the dual-functional catalytic system. The two catalysts in the dual-functional catalytic system match well because of the employment of triethylaluminum (AlEt3) as the single cocatalyst to both Ti(OBu)(4) and MAO/SiO2/Et(Ind)(2)ZrCl2, exhibiting high polymerization activity and improved properties of the obtained polyethylene. There is a noticeable increment in catalytic activity when the amount of Ti(OBU)(4) in the reactor increases and I-butene can be incorporated by about 6.51 mol % in the backbone of polyethylene chains at the highest Ti(OBU)(4) concentration in the feed. The molecular weights (M-w), melting points, and crystallinity of the LLDPE descend as the amount of Ti(OBU)(4) decreases, which is attributed mainly to chain termination and high branching degree, while the molecular weight distribution remains within a narrow range as in the case of metallocene catalysts. (C) 2004 Wiley Periodicals, Inc.
语种	英语
出版者	JOHN WILEY & SONS INC
WOS记录号	WOS:000224925000028
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/81643]
专题	中国科学院化学研究所
通讯作者	Guo, CY
作者单位	1.Chinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat, CAS Key Lab Engn Plast, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhu, BC,Guo, CY,Liu, ZY,et al. In situ copolymerization of ethylene to produce linear low-density polyethylene by Ti(OBu)(4)/AlEt3-MAO/SiO2/Et(Ind)(2)ZrCl2[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2004,94(6):2451-2455.
APA	Zhu, BC,Guo, CY,Liu, ZY,&Yin, YQ.(2004).In situ copolymerization of ethylene to produce linear low-density polyethylene by Ti(OBu)(4)/AlEt3-MAO/SiO2/Et(Ind)(2)ZrCl2.JOURNAL OF APPLIED POLYMER SCIENCE,94(6),2451-2455.
MLA	Zhu, BC,et al."In situ copolymerization of ethylene to produce linear low-density polyethylene by Ti(OBu)(4)/AlEt3-MAO/SiO2/Et(Ind)(2)ZrCl2".JOURNAL OF APPLIED POLYMER SCIENCE 94.6(2004):2451-2455.