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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, Youmei1,2; Shen, Guorong1,2; Liu, Xiaohui3; Li, Yuesheng1
2013-07-01
Source PublicationJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
ISSN0887-624X
Volume51Issue:13Pages:2959-2969
AbstractHyperbranched 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
KeywordAllene Functionalized Hyperbranched Living Radical Polymerization (Lrp) Radical Polymerization Reversible Addition Fragmentation Chain Transfer (Raft)
DOI10.1002/pola.26693
Indexed BySCI
Language英语
WOS IDWOS:000319681900023
PublisherWILEY-BLACKWELL
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/54114
Collection中国科学院化学研究所
Corresponding AuthorLi, Yuesheng
Affiliation1.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
Recommended Citation
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.
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