Article (Scientific journals)
Direct NMR evidence for a local resriction in the segmental chain mobility of a model ionomer
Vanhoorne, Pierre; Jérôme, Robert; Teyssié, Philippe et al.
1994In Macromolecules, 27 (9), p. 2548-2552
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Keywords :
halatotelechelic polymer
Abstract :
[en] To probe the local mobility of the chain segments directly attached to ionic multiplets, two model ionomers have been synthesized. The first one is a carboxylato-telechelic deuterated polystyrene in which the chain segments bearing the sodium carboxylate end groups have been selectively protonated; the second one has a protonated polystyrene backbone terminated at both ends with a deuterated polystyrene segment bearing the sodium carboxylate groups. Both polymers have been studied by high-resolution solid-state C-13 NMR. Line-width measurements of the protonated units have clearly shown that the dipolar interactions of the sodium carboxylate end groups are responsible for a mobility restriction of the chain end segments. This experiment is thought to be the first direct evidence for the model recently proposed by Eisenberg et al. for ionomer morphology according to which the ionic multiplets are surrounded with a shell of constrained polymer segments.
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Materials science & engineering
Chemistry
Author, co-author :
Vanhoorne, Pierre;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Jérôme, Robert ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Teyssié, Philippe ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Lauprêtre, F.;  Ecole Supérieure de Physique et de Chimie Industrielle de la Ville de Paris (ESPCI), France > Laboratoire de Physico-Chimie Structurale et Macromoléculaire associé au CNRS
Language :
English
Title :
Direct NMR evidence for a local resriction in the segmental chain mobility of a model ionomer
Publication date :
25 April 1994
Journal title :
Macromolecules
ISSN :
0024-9297
eISSN :
1520-5835
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
27
Issue :
9
Pages :
2548-2552
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
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