Metallocene-mediated olefin polymerization with B-H chain transfer agents: Synthesis of chain-end functionalized polyolefins and diblock copolymers

doi:10.1021/ma011074d

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	Metallocene-mediated olefin polymerization with B-H chain transfer agents: Synthesis of chain-end functionalized polyolefins and diblock copolymers
	Chung, TC ; Xu, G ; Lu, YY ; Hu, YL
刊名	MACROMOLECULES
	2001-11-06
卷号	34 期号:23 页码:8040-8050
ISSN号	0024-9297
DOI	10.1021/ma011074d
英文摘要	A systematic study of the scope and limitations of B-H chain transfer agents during metallocene-mediated olefin polymerization is discussed in this contribution. The polymerization procedures provide a convenient route to prepare chain-end functionalized polyolefins and polyolefin diblock copolymers containing both polyolefin and functional polymer blocks. With the proper choice of borane chain transfer agents, metallocene catalyst systems, and reaction conditions, the chemistry can be applied to a broad range of polyolefin homo- and copolymers, such as polyethylene, polypropylene, syndiotactic polystyrene, poly(ethylene-co-propylene), poly(ethylene-co-1-octene), and poly(ethylene-co-styrene). The molecular weight of the borane-terminated polyolefin is basically inversely proportional to the molar ratio of [borane]/[olefin]. In turn, the terminal borane group is very reactive, which can be quantitatively converted to various functional groups and also can be selectively oxidized to form a stable polymeric radical for living free radical polymerization of functional monomers. This process resembles a transformation reaction from metallocene polymerization to living free radical polymerization via the borane terminal group to produce functional polyolefin diblock copolymers, which are difficult to prepare using conventional initiaors.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000171981500020
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/78011]
专题	中国科学院化学研究所
通讯作者	Chung, TC
作者单位	1.Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA 2.Acad Sinica, Inst Chem, State Key Lab Engn Plast, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Chung, TC,Xu, G,Lu, YY,et al. Metallocene-mediated olefin polymerization with B-H chain transfer agents: Synthesis of chain-end functionalized polyolefins and diblock copolymers[J]. MACROMOLECULES,2001,34(23):8040-8050.
APA	Chung, TC,Xu, G,Lu, YY,&Hu, YL.(2001).Metallocene-mediated olefin polymerization with B-H chain transfer agents: Synthesis of chain-end functionalized polyolefins and diblock copolymers.MACROMOLECULES,34(23),8040-8050.
MLA	Chung, TC,et al."Metallocene-mediated olefin polymerization with B-H chain transfer agents: Synthesis of chain-end functionalized polyolefins and diblock copolymers".MACROMOLECULES 34.23(2001):8040-8050.