ORBi: Paul Marie-Amélie - (Plasticized) polylactide/(organo-)clay nanocomposites by in situ intercalative polymerization

Reference : (Plasticized) polylactide/(organo-)clay nanocomposites by in situ intercalative polymeri...


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Chemistry Physical, chemical, mathematical & earth Sciences : Physics Engineering, computing & technology : Materials science & engineering
	To cite this reference:	http://hdl.handle.net/2268/126464

Title :	(Plasticized) polylactide/(organo-)clay nanocomposites by in situ intercalative polymerization
Language :	English
Author, co-author :	Paul, Marie-Amélie [Université de Mons-Hainaut - UMH > > Laboratory of Polymeric and Composite Materials (LPCM) > >]
	Delcourt, Cécile [Université de Mons-Hainaut - UMH > > Laboratory of Polymeric and Composite Materials (LPCM) > >]
	Alexandre, Michaël [Université de Mons-Hainaut - UMH > > Laboratory of Polymeric and Composite Materials (LPCM) > >]
	Degée, Philippe [Université de Mons-Hainaut - UMH > > Laboratory of Polymeric and Composite Materials (LPCM) > >]
	Monteverde, Fabien [Université de Mons-Hainaut - UMH > > Laboratory of Analytic and Inorganic Chemistry (LAIC) > >]
	Rulmont, André [Université de Liège - ULg > Département de chimie (sciences) > General Chemistry and Physics Chemistry Department > >]
	Dubois, Philippe [Université de Mons-Hainaut - UMH > > Laboratory of Polymeric and Composite Materials (LPCM) > >]
Publication date :	21-Feb-2005
Journal title :	Macromolecular Chemistry and Physics
Publisher :	Wiley-V C H Verlag Gmbh
Volume :	206
Issue/season :	4
Pages :	484-498
Audience :	International
ISSN :	1022-1352
City :	Weinheim
Keywords :	[en] nanocomposites ; organoclay ; poly(L,L-lactide) ; ring-opening polymerization
Abstract :	[en] Both intercalated and exfoliated poly(L,L-lactide) (P(L,L-LA)/organomodified montmorillonite nanocomposites were synthesized by in situ ring-opening polymerization Of L,L-lactide, in bulk, directly in the presence of the nanofiller. Intercalation of polyester chains was found to appear even for natural unmodified montmorillonite-Na+, while exfoliation occurred when the aluminosilicate layers were modified by ammonium cations bearing primary hydroxyl groups. Clay delamination was effectively triggered by the grafting reaction of the growing PLA chains onto the hydroxyl groups. Aluminium triisopropoxide, triethylaluminium, and stannous octoate, as initiating or co-initiating species, were compared in terms of polymerization control. The influence of nanoclay content (from 1 to 10 wt.-% in inorganics) on morphology and thermal behavior was also studied. In parallel, a highly filled nanocomposite (called masterbatch), prepared by in situ polymerization, was dispersed into a (plasticized) preformed polylactide matrix in the molten state, to reach a better clay delamination than that obtained by direct melt blending. Finally, L-,L-lactide and alpha,w-dihydroxylated poly(ethylene glycol) (PEG 1000) were copolymerized in presence of clay in order to study the behavior of the resulting triblocks towards nanocomposite formation.
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/126464
DOI :	10.1002/macp.200400324

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