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	Synthesis of well-defined difunctional polydimethylsiloxane with an efficient dianionic initiator for aba triblock copolymer
	Zhang, Yong; Zhang, Zhijie; Wang, Qian; Xie, Zemin
刊名	Journal of applied polymer science
	2007-01-05
卷号	103期号:1页码:153-159
关键词	Anionic polymerization Cyclotetrasiloxane Polydimethylsiloxane Hydrosilation Block copolymer
ISSN号	0021-8995
DOI	10.1002/app.25021
通讯作者	Zhang, zhijie(zhangzj@iccas.ac.cn)
英文摘要	A new efficient dianionic initiator dipotassium diphenylsilanediolate (ph2si(ok)(2)) was synthesized by reacting diphenylsilanediol with potassium in the mixture of thf and benzene. the anionic ring-opening polymerization of octamethylcyclotetrasiloxane (d-4) or tetramethyltetravinylcyclotetrasiloxane (d-4(vi)) initiated by ph2si(ok)(2) was systematically investigated. a number of factors including the nature of initiators, promoters, and monomers, the molar ratio of promoter to initiator (c-p/c-i ratio) and monomer to initiator (c-p/c-i ratio) affect the polymerization remarkably. using n-methyl-2-pyrrolidinone as the promoter, a series of well-defined difunctional h-si-terminated polydimethylsiloxanes (pdmss) were prepared with high monomer conversion (> 90%) and relatively low polydispersity (< 1.6) at 30 degrees c. by hydrosilation of the synthesized pdms with ally end-capped poly(ethylene oxide) (peo), amphiphilic peo-b-pdms-b-peo triblock copolymers with low polydispersities and high block purities were obtained. (c) 2006 wiley periodicals, inc. j appl polym sci 103: 153-159, 2007
WOS关键词	BLOCK-COPOLYMERS ; DIBLOCK COPOLYMERS ; THIN-FILMS ; POLYMERS
WOS研究方向	Polymer Science
WOS类目	Polymer Science
语种	英语
出版者	JOHN WILEY & SONS INC
WOS记录号	WOS:000242060800021
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2381323
专题	中国科学院大学
通讯作者	Zhang, Zhijie
作者单位	1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yong,Zhang, Zhijie,Wang, Qian,et al. Synthesis of well-defined difunctional polydimethylsiloxane with an efficient dianionic initiator for aba triblock copolymer[J]. Journal of applied polymer science,2007,103(1):153-159.
APA	Zhang, Yong,Zhang, Zhijie,Wang, Qian,&Xie, Zemin.(2007).Synthesis of well-defined difunctional polydimethylsiloxane with an efficient dianionic initiator for aba triblock copolymer.Journal of applied polymer science,103(1),153-159.
MLA	Zhang, Yong,et al."Synthesis of well-defined difunctional polydimethylsiloxane with an efficient dianionic initiator for aba triblock copolymer".Journal of applied polymer science 103.1(2007):153-159.

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