ORBi: Maertens Christophe - Synthesis and polarized light-induced birefringence of new polymethacrylates containing carbazolyl and azobenzene pendant groups

Reference : Synthesis and polarized light-induced birefringence of new polymethacrylates containing ...


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Materials science & engineering Physical, chemical, mathematical & earth Sciences : Chemistry
	To cite this reference:	http://hdl.handle.net/2268/12789

Title :	Synthesis and polarized light-induced birefringence of new polymethacrylates containing carbazolyl and azobenzene pendant groups
Language :	English
Author, co-author :	Maertens, Christophe [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
	Dubois, Philippe [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) > >]
	Blanche, Pierre-Alexandre [University of Liège (ULg) > Centre Spatial de Liège > > >]
	Lemaire, P. C. [University of Liège (ULg) > Centre Spatial de Liège > > >]
Publication date :	1-Jan-2000
Journal title :	Journal of Polymer Science Part B-Polymer Physics
Publisher :	John Wiley & Sons
Volume :	38
Issue/season :	1
Pages :	205-213
Audience :	International
ISSN :	0887-6266
City :	Hoboken
Keywords :	[en] nonlinear optics
Abstract :	[en] Low Tg copolymers of [11(N-carbazolyl)undecylmethacrylate] and [2,5-dimethylphenyl-[(4-nitrophenyl)azo]-phenoxyalkylmethacrylate] have been synthesized and the polarized light-induced birefringence of thick films (70 m) has been investigated at a constant deducted temperature relative to Tg (T - Tg = 10 °C). The optical properties of these copolymers have been studied in relation to the azo-dye content and the length of the alkyl spacer between the azo-dye and the methacrylic backbone. They have been compared with the dispersion of (4-methoxy-2,5-dimethylphenyl)-(4-nitrophenyl)diazene (DMNPAA) within a poly[11(N-carbazolyl)undecyl-methacrylate] and a poly[N-vinylcarbazole] (PVK) matrix. The experimental curves have been fitted by biexponentials, so emphasizing the effects of the copolymer structure on the kinetics of the writing process. The photoinduced orientation is more than three orders of magnitude higher in a grafted material compared to the dispersion version. The azo-dye concentration also has an important role in both the amplitude and the dynamics of the photo-orientation.
Research units :	Center for Education and Research on Macromolecules (CERM)
Funders :	Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA ; Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/12789
DOI :	10.1002/(SICI)1099-0488(20000101)38:1<205::AID-POLB23>3.0.CO;2-H
Other URL :	http://www3.interscience.wiley.com/cgi-bin/fulltext/67500748/PDFSTART

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