ORBi: Plante Michel - Blends of biphasic ionomers with chemically identical mono- and bifunctional oligomers

Reference : Blends of biphasic ionomers with chemically identical mono- and bifunctional oligomers


	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/2268/15777

Title :	Blends of biphasic ionomers with chemically identical mono- and bifunctional oligomers
Language :	English
Author, co-author :	Plante, Michel [University of Laval, Quebec, Canada > Department of Chemistry > Centre de Recherche en Sciences et Ingénierie des Macromolécules (CERSIM) > >]
	Bazuin, C Géraldine [University of Laval, Quebec, Canada > Department of Chemistry > Centre de Recherche en Sciences et Ingénierie des Macromolécules (CERSIM) > >]
	Jérôme, Robert [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Publication date :	17-Jul-1995
Journal title :	Macromolecules
Publisher :	Amer Chemical Soc
Volume :	28
Issue/season :	15
Pages :	5240-5247
Audience :	International
ISSN :	0024-9297
City :	Washington
Keywords :	[en] halatotelechelic polymer
Abstract :	[en] Biphasic Cs and Ba carboxylated polystyrene ionomers were blended with chemically identical mono- and bifunctional oligomers whose chain lengths are significantly greater than the average segmental length between ionic groups in the ionomer. The ionomers were chosen to have two ion contents such that, in one case, the matrix phase is dominant and, in the other, the cluster phase is dominant. From dynamic mechanical thermal analysis, it was observed that the biphasic morphology of the ionomers is preserved in all blends (containing up to 60 wt % oligomer). The monofunctional oligomers tend to have a mild plasticizing action on the two phases. In the matrix-dominated ionomer, the bifunctional oligomer has an antiplasticization effect at lower oligomer contents; this is attributed to a greater dispersion of ionic aggregates in the matrix phase, accompanied by pinning of the oligomer extremities in multiplets, which prevents plasticizing action. In the cluster-dominated ionomer, the oligomer forms a separate phase, which is related to insufficiently large ion-poor styrene regions in the ionomer to accommodate the long nonionic portion of the oligomer chains.
Research units :	Center for Education and Research on Macromolecules (CERM)
Funders :	NSERC (Canada) ; FCAR (Qudbec) ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; The “Ministère de l'Enseignement Supérieur et des Sciences du Québec" ; The "Communauté Française de Belgique"
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/15777
DOI :	10.1021/ma00119a011
Other URL :	http://pubs.acs.org/doi/pdf/10.1021/ma00119a011

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