Reference : Reactively and physically compatibilized immiscible polymer blends: Stability of the ...
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/9053
Reactively and physically compatibilized immiscible polymer blends: Stability of the copolymer at the interface
English
Harrats, Charef [Katholieke Universiteit Leuven (KUL) > Department of Chemistry > Laboratory of Macromolecular Structural Chemistry > >]
Dedecker, Kristof [Katholieke Universiteit Leuven (KUL) > Department of Chemistry > Laboratory of Macromolecular Structural Chemistry > >]
Groeninckx, Gabriel [Katholieke Universiteit Leuven (KUL) > Department of Chemistry > Laboratory of Macromolecular Structural Chemistry > >]
Jérôme, Robert mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Aug-2003
Macromolecular Symposia
Wiley-V C H Verlag Gmbh
198
183-196
Yes (verified by ORBi)
International
1022-1360
1521-3900
Weinheim
[en] nanostructured material ; self-assembly in bulk ; reactive blend
[en] This paper reports on the interfacial behaviour' of block and graft copolymers used as compatibilizers in immiscible polymer blends. A limited residence time of the copolymer at the interface has been shown in both reactive blending and blend compatibilization by preformed copolymers. Polystyrene (PS)/polyamide6 (PA6), polyphenylene oxide (PPO)/ PA6 and polymethylmethaciylate (PMMA)/PA6 blends have . been reactively compatibilized by a styrene-maleic anhydride copolymer SMA. The extent of miscibility of SMA with PS, PPO and PMMA is a key criterion for the stability of the graft copolymer' at the interface. For the first 10 to 15 minutes of mixing, the in situ formed copolymer is able to decrease the particle size of the dispersed phase and to prevent it from coalescencing. However, upon increasing mixing time, the copolymer leaves the interface which results in phase coalescence. In PS/LDPE blends compatibilized by preformed PS / hydrogenated polybutadiene (hPB) block copolymers, a tapered diblock stabilizes efficiently a co-continuous two-phase morphology, in contrast to a triblock copolymer that was unable to prevent phase coarsening during annealing at 180°C for 150 minutes.
Center for Education and Research on Macromolecules (CERM)
The Research Council of the KULeuven (GOA project 98/06)
Researchers
http://hdl.handle.net/2268/9053
10.1002/masy.200350816
http://www3.interscience.wiley.com/cgi-bin/fulltext/104556457/PDFSTART

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