[en] Carboxy-telechelic polystyrenes with degrees of polymerization of ca. 70 were examined by
small-angle neutron scattering in the Na+ ionomer and methyl ester forms to ascertain the effect of ionic aggregation on the chain dimensions. The ionomers contain ionic aggregates, as demonstrated by smallangle X-ray scattering. The chain dimensions were found to be identical for the ionomer and ester, in agreement with the predictions of Squires et al. but in disagreement with the theories of Forsman and Dreyfus. Detailed analysis of the data showed that the contacts between the two isotopic types were random, as intended. The data were satisfactorily described by a polydisperse assembly of wormlike chains, with a Kuhn statistical length comparable to that for homopolystyrene.
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry Materials science & engineering
Author, co-author :
Register, Richard A; University of Wisconsin, Madison, USA > Department of Chemical Engineering
Cooper, Stuart L; University of Wisconsin, Madison, USA > Department of Chemical Engineering
Thiyagarajan, Pappannan; Argonne National Laboratory, Argonne, Illinois, USA > Chemistry and IPNS Divisions
Chakrapani, S.; Université de Liège - ULiège > Department of Chemistry > Laboratory of Macromolecular Chemistry and Organic Catalysis
Jérôme, Robert ; Université de Liège - ULiège > Department of Chemistry > Laboratory of Macromolecular Chemistry and Organic Catalysis
Language :
English
Title :
Effect of ionic aggregation on ionomer chain dimensions. 1. Telechelic polystyrenes
Publication date :
28 May 1990
Journal title :
Macromolecules
ISSN :
0024-9297
eISSN :
1520-5835
Publisher :
American Chemical Society, Washington, United States - District of Columbia
The U.S. Department of Energy The Department of Energy, BES-Materials Science The Fannie and John Hertz Foundation BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
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