ORBi: Wang Jin-Shan - Anionic polymerization of acrylic monomers. 21. Anionic sequential polymerization of 2-ethylhexyl acrylate and methyl methacrylate

Reference : Anionic polymerization of acrylic monomers. 21. Anionic sequential polymerization of 2-e...


	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/2268/16276

Title :	Anionic polymerization of acrylic monomers. 21. Anionic sequential polymerization of 2-ethylhexyl acrylate and methyl methacrylate
Language :	English
Author, co-author :	Wang, Jin-Shan [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
	Jérôme, Robert [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
	Bayard, Philippe [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
	Teyssié, Philippe [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Publication date :	29-Aug-1994
Journal title :	Macromolecules
Publisher :	American Chemical Society
Volume :	27
Issue/season :	18
Pages :	4908-4913
Peer reviewed :	Yes (verified by ORBi)
Audience :	International
ISSN :	0024-9297
City :	Washington
Country :	DC
Keywords :	[en] anionic polymerization ; (meth)acrylate
Abstract :	[en] A mixed complex of a polydentate lithium alkoxide, i.e., lithium 2-(2-methoxyethoxy) ethoxide (LiOEEM), and of a mono- or bisfunctional organolithium initiator, i.e., (diphenylmethyl)lithium (DPMLi) or lithium naphthalene/diphenylethylene, has been used to synthesize well-controlled AB (BA), ABA, and BAB block copolymers of methylmethacrylate (MMA) (A) and 2-ethylhexyl acrylate (2EtHA) (B), irrespective of the monomer addition order. Although the 2EtHA block copolymerization initiated with monofunctional living PMMA macroanions at -78 degrees C in a 75/25 toluene/THF mixture gives rise to a precisely-tailored PMMA-b-P2EtHA diblock polymer, the reverse sequence, i.e.,from P2EtHA anions to the MMA type monomer, always results in contamination by homo-P2EtHA. This has been interpreted in terms of the short shelf lifetime of P2EtHA anions present. Nevertheless, a pure P2EtHA-b-PMMA type diblock copolymer can be produced at -100 degrees C, while keeping other conditions unchanged. More importantly, a well-controlled PMMA-b-P2EtHA-b-PMMA triblock copolymer has been prepared through a three-stage process with a monofunctional initiator, actually providing a potential pathway toward the direct synthesis of a novel type of fully acrylic thermoplastic elastomer, instead of the more complicated hydrolysis/transalcoholysis process previously demonstrated by us.
Research units :	Center for Education and Research on Macromolecules (CERM)
Funders :	Elf-Atochem ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/16276
DOI :	10.1021/ma00096a010
Other URL :	http://pubs.acs.org/doi/pdf/10.1021/ma00096a010

File(s) associated to this reference

Fulltext file(s):

	File	Commentary	Version	Size	Access
Restricted access	Wang JS 1994 Macromolecules 4908.pdf		Publisher postprint	710.03 kB	Request copy

All documents in ORBi are protected by a user license.

Dspace v1.5