RAFT polymerization of a novel allene-derived asymmetrical divinyl monomer: A facile strategy to alkene-functionalized hyperbranched vinyl polymers with high degrees of branching

doi:10.1002/pola.26693

CORC > 化学研究所 > 中国科学院化学研究所

	RAFT polymerization of a novel allene-derived asymmetrical divinyl monomer: A facile strategy to alkene-functionalized hyperbranched vinyl polymers with high degrees of branching
	Bao, Youmei 1,2; Shen, Guorong 1,2; Liu, Xiaohui 3; Li, Yuesheng 1
刊名	JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
	2013-07-01
卷号	51 期号:13 页码:2959-2969
关键词	Allene Functionalized Hyperbranched Living Radical Polymerization (Lrp) Radical Polymerization Reversible Addition Fragmentation Chain Transfer (Raft)
ISSN号	0887-624X
DOI	10.1002/pola.26693
英文摘要	Hyperbranched vinyl polymers with high degrees of branching (DBs) up to 0.43 functionalized with numerous pendent allene groups have been successfully prepared via reversible addition fragmentation chain transfer polymerization of a state-of-art allene-derived asymmetrical divinyl monomer, allenemethyl methacrylate (AMMA). The gelation did not occur until high monomer conversions (above 90%), as a result of the optimized reactivity difference between the two vinyl groups in AMMA. The branched structure was confirmed by a combination of a triple-detection size exclusion chromatography (light scattering, refractive index, and viscosity detectors) and detailed 1H NMR analyses. A two-step mechanism is proposed for the evolution of branching according to the dependence of molecular weight and DB on monomer conversion. Controlled radical polymerization proceeds until moderate conversions, mainly producing linear polymers. Subsequent initiation and propagation on the polymerizable allene side chains as well as the coupling of macromolecular chains generate numerous branches at moderate-to-high monomer conversions, dramatically increasing the molecular weight of the polymer. AMMA was also explored as a new branching agent to construct poly(methyl methacrylate)-type hyperbranched polymers by its copolymerization with methyl methacrylate. The DB can be effectively tuned by the amount of AMMA, showing a linear increase trend. The pendent allene groups in the side chains of the copolymers were further functionalized by epoxidation and thiol-ene chemistry in satisfactory yields. (c) 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 2959-2969
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000319681900023
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/54113]
专题	中国科学院化学研究所
通讯作者	Li, Yuesheng
作者单位	1.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Changchun Inst Appl Chem, Changchun 130022, Peoples R China 2.Univ Chinese Acad Sci, Changchun Branch, Changchun 130022, Peoples R China 3.Tianjin Polytech Univ, Sch Mat Sci & Engn, Key Lab Hollow Fiber Membrane Mat & Proc, Minist Educ, Tianjin 300387, Peoples R China
推荐引用方式 GB/T 7714	Bao, Youmei,Shen, Guorong,Liu, Xiaohui,et al. RAFT polymerization of a novel allene-derived asymmetrical divinyl monomer: A facile strategy to alkene-functionalized hyperbranched vinyl polymers with high degrees of branching[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2013,51(13):2959-2969.
APA	Bao, Youmei,Shen, Guorong,Liu, Xiaohui,&Li, Yuesheng.(2013).RAFT polymerization of a novel allene-derived asymmetrical divinyl monomer: A facile strategy to alkene-functionalized hyperbranched vinyl polymers with high degrees of branching.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,51(13),2959-2969.
MLA	Bao, Youmei,et al."RAFT polymerization of a novel allene-derived asymmetrical divinyl monomer: A facile strategy to alkene-functionalized hyperbranched vinyl polymers with high degrees of branching".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 51.13(2013):2959-2969.