ICCAS OpenIR
Preparation of lldpe from the " in-situ " copolymerization of ethylene catalyzed by a novel iminopyridyl iron complex and metallocene
Huang, YJ; Liu, PG; Ji, RQ; Cao, CG; Yan, WD; Hu, YL
2004-02-01
Source PublicationACTA POLYMERICA SINICA
ISSN1000-3304
Issue1Pages:125-128
AbstractLinear low density polyethylene from ethylene as an only monomer was prepared by the combination catalyst system of Et (Ind)(2)ZrCl2 and {2-[2-Me-4-Br-C6H3N = C(Me)](2)C5H3N} FeCl2 activated with methylaluminoxane (MAO). The two catalysts were well matched in a single reactor and it was observed that the "comonomer effect" appeared in the in-situ copolymerization of ethylene. The comonomer effect was some strongly influenced by the molar ratio of Al to (Fe + Zr) and the polymerization temperatures. At 60degreesC and n (Al)/ n (Fe + Zr) = 2000, the maximum activity of the catalytic system ( 8.5 x 10(6) g/mol . h) was 4.25 times higher than that of homopolymerization of ethylene(2.0 x 10(6) g/mol . h) and the value of n(Fe)/n(Zr) was 0.5. At n(Al)/n(Fe + Zr) 1000, the maximum activity diminished. When polymerization temperatures increased, the maximum activity of the in-situ copolymerization decreased and the corresponding ratio of Fe to Zr also decayed. The copolymers made from this catalytic system had the characteristics of low melting point ( from 132.34degreesC to 70.97 degreesC low density ( from 0.9467 g/cm(3) to 0.9283 g/cm(3)) and narrow molecular weight distribution from 2.29 to 1.86 However, it's no obvious influence of the comonomer effect on the physical properties of the copolymers.
Keyword"in-situ" Copolymerization Comonomer Effect Metallocene Iminopyridyl Iron Complex Linear Low Density Polyethylene
Indexed BySCI
Language英语
WOS IDWOS:000188968000025
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/82552
Collection中国科学院化学研究所
Corresponding AuthorHuang, YJ
Affiliation1.Hebei Univ Technol, Inst Polymer Sci & Engn, Tianjin 300130, Peoples R China
2.Chinese Acad Sci, Inst Chem, State Key Lab Engn Plast, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Huang, YJ,Liu, PG,Ji, RQ,et al. Preparation of lldpe from the " in-situ " copolymerization of ethylene catalyzed by a novel iminopyridyl iron complex and metallocene[J]. ACTA POLYMERICA SINICA,2004(1):125-128.
APA Huang, YJ,Liu, PG,Ji, RQ,Cao, CG,Yan, WD,&Hu, YL.(2004).Preparation of lldpe from the " in-situ " copolymerization of ethylene catalyzed by a novel iminopyridyl iron complex and metallocene.ACTA POLYMERICA SINICA(1),125-128.
MLA Huang, YJ,et al."Preparation of lldpe from the " in-situ " copolymerization of ethylene catalyzed by a novel iminopyridyl iron complex and metallocene".ACTA POLYMERICA SINICA .1(2004):125-128.
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