Supporting a metallocene on functional polypropylene granules for slurry ethylene polymerization

doi:10.1021/ma049311a

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	Supporting a metallocene on functional polypropylene granules for slurry ethylene polymerization
	Liu, JG; Dong, JY; Cui, NN; Hu, YL
刊名	MACROMOLECULES
	2004-08-24
卷号	37 期号:17 页码:6275-6282
ISSN号	0024-9297
DOI	10.1021/ma049311a
英文摘要	We report on the exploration of functional polypropylene as supporting material for homogeneous metallocene catalyst. The copolymerization of propylene and 5-hexenyl-9-BBN by a spherical MgCl2-supported TiCl4 catalyst containing diisobutyl phthalate internal electron donor combined with AlEt3 activator and dimethoxydiphenylsilane external donor afforded isotactic polypropylene granules bearing reactive alkyl-9-BBN groups, which, upon being treated with H2O2/NaOH, resulted in polypropylene granules containing hydroxy functionality. Immobilization of Cp2ZrCl2/MAO was then conducted in toluene solution at an elevated temperature following the procedure of treating the hydroxyl-containing polymers sequentially with MAO and Cp2ZrCl2. Elemental analysis of the Zr contents of the supported catalysts reveals that they are proportional to the concentrations of hydroxy group on the support. In turn, the efficiency of the supported catalysts in slurry ethylene polymerization also exhibits a significant dependency on the hydroxy group concentration: the higher the concentration, the higher the polymerization efficiency. The polymers produced by the functional polypropylene-supported catalysts possess improved apparent morphology as compared with those by the homogeneous catalyst as well as by the hydroxyl-free, net polypropylene-supported one.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000223448300006
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/82123]
专题	中国科学院化学研究所
通讯作者	Dong, JY
作者单位	Chinese Acad Sci, CAS Key Lab Engn Plast, Joint Lab Polymer Sci & Mat, Inst Chem, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Liu, JG,Dong, JY,Cui, NN,et al. Supporting a metallocene on functional polypropylene granules for slurry ethylene polymerization[J]. MACROMOLECULES,2004,37(17):6275-6282.
APA	Liu, JG,Dong, JY,Cui, NN,&Hu, YL.(2004).Supporting a metallocene on functional polypropylene granules for slurry ethylene polymerization.MACROMOLECULES,37(17),6275-6282.
MLA	Liu, JG,et al."Supporting a metallocene on functional polypropylene granules for slurry ethylene polymerization".MACROMOLECULES 37.17(2004):6275-6282.