ORBi: Varshney Sunil K - Anionic polymerization of acrylic monomers. 6. Synthesis, characterization, and modification of poly(methyl methacrylate)-poly(tert-butyl acrylate) di- and triblock copolymers

Reference : Anionic polymerization of acrylic monomers. 6. Synthesis, characterization, and modifica...


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Chemistry Engineering, computing & technology : Materials science & engineering
	To cite this reference:	http://hdl.handle.net/2268/15944

Title :	Anionic polymerization of acrylic monomers. 6. Synthesis, characterization, and modification of poly(methyl methacrylate)-poly(tert-butyl acrylate) di- and triblock copolymers
Language :	English
Author, co-author :	Varshney, Sunil K [University of Liège (ULg) > Department of Chemistry > Laboratory of Macromolecular Chemistry and Organic Catalysis > >]
	Jacobs, Christian [University of Liège (ULg) > Department of Chemistry > Laboratory of Macromolecular Chemistry and Organic Catalysis > >]
	Hautekeer, Jean-Paul [University of Liège (ULg) > Department of Chemistry > Laboratory of Macromolecular Chemistry and Organic Catalysis > >]
	Bayard, Philippe [University of Liège (ULg) > Department of Chemistry > Laboratory of Macromolecular Chemistry and Organic Catalysis > >]
	Jérôme, Robert [University of Liège (ULg) > Department of Chemistry > Laboratory of Macromolecular Chemistry and Organic Catalysis > >]
	Fayt, Roger [University of Liège (ULg) > Department of Chemistry > Laboratory of Macromolecular Chemistry and Organic Catalysis > >]
	Teyssié, Philippe [University of Liège (ULg) > Department of Chemistry > Laboratory of Macromolecular Chemistry and Organic Catalysis > >]
Publication date :	2-Sep-1991
Journal title :	Macromolecules
Publisher :	American Chemical Society
Volume :	24
Issue/season :	18
Pages :	4997-5000
Peer reviewed :	Yes (verified by ORBi)
Audience :	International
ISSN :	0024-9297
City :	Washington
Country :	DC
Keywords :	[en] anionic polymerization ; (meth)acrylate ; block copolymer
Abstract :	[en] Poly(methyl methacrylate)-b-poly(tert-butyl acrylate) (PMMA-b-PtBA) copolymers have been successfully synthesized by the sequential anionic polymerization of methyl methacrylate (MMA) and tert-butyl acrylate (tBA) in THF at -78-degrees-C. Although the order of monomer addition makes a difference on the initiation efficiency, it has no significant effect on the final achievement. Mono- and bifunctional initiators based on alkali metals can be used. When the initiators are modified by LiCl as a ligand, the polymerization of each block appears to be living, the molecular weight and composition can be predicted, and the molecular weight distribution is narrow. Size exclusion chromatography supports the absence of homo-PtBA in the PtBA-b-PMMA samples. The PtBA blocks can be quantitatively hydrolyzed into polyacid ones as supported by titration and H-1 NMR analysis.
Research units :	Center for Education and Research on Macromolecules (CERM)
Funders :	Norsolor, France ; Cipari, Luxembourg ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/15944
DOI :	10.1021/ma00018a003
Other URL :	http://pubs.acs.org/doi/pdf/10.1021/ma00018a003

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