Article (Scientific journals)
Molecular design of multicomponent polymer systems XIX : stability of cocontinuous phase morphologies in low-density polyethylene-polystyrene blends emulsified by block copolymers
Harrats, Charef; Blacher, Silvia; Fayt, Roger et al.
1995In Journal of Polymer Science. Part B, Polymer Physics, 33 (5), p. 801-811
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Keywords :
polymer blend
Abstract :
[en] Polyethylene-polystyrene blends containing small amounts of polyethylene (20 wt %) display a cocontinuous phase morphology that is very unstable in the absence of an emulsifier. The kinetics of coalescence at high temperature is therefore very sensitive to differences in the interfacial activity of added polymeric emulsifiers. The morphology of blends added with a pure or a tapered hydrogenated polybutadiene-b-polystyrene block copolymer is investigated as a function of annealing time at 180°C. Various image treatments (standard granulometry, opening size granulometry distribution, and multiscaling analysis) were used to quantify the morphological evolution of these blends. The results clearly demonstrate that the tapered block copolymer is definitely more efficient than the corresponding pure diblock for stabilizing the cocontinuous structure of these blends. The differential behavior is assumed to results from differences in the tendency of the two copolymers to segregate and form their own domains. © 1995 John Wiley
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Materials science & engineering
Chemistry
Author, co-author :
Harrats, Charef;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Blacher, Silvia ;  University of Liège (ULg), Department of Applied Chemistry, Laboratory of Chemical Engineering
Fayt, Roger;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Jérôme, Robert ;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Teyssié, Philippe ;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Molecular design of multicomponent polymer systems XIX : stability of cocontinuous phase morphologies in low-density polyethylene-polystyrene blends emulsified by block copolymers
Publication date :
15 April 1995
Journal title :
Journal of Polymer Science. Part B, Polymer Physics
ISSN :
0887-6266
eISSN :
1099-0488
Publisher :
John Wiley & Sons, Hoboken, United States - New Jersey
Volume :
33
Issue :
5
Pages :
801-811
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
Available on ORBi :
since 30 June 2009

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