[en] Coordination of the amino end groups of a telechelic polymer to transition-metal salts has been found to modify profoundly the solution behavior of that material. In toluene, the relative viscosity increases rapidly with concentration, in a way that depends on the transition metal. The coordination ability of the metal cations has been observed to be as follows: Ni < Co < Fe < Cu. The sharpness of the increase in viscosity upon increasing polymer concentration can be significantly reduced in a polar solvent and more effectively in a solvent able to compete with the amino end groups for the coordination sites of the transition metal. Moreover, the viscosity effect, and accordingly the association of the amino end groups, appears to be maximum at a Cu/amine molar ratio of 1. Any change in this ratio between 0.33 and 1.25 causes a drop in the solution viscosity. Empirical equations have been derived to fit the experimental hydrodynamic behavior.
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry Materials science & engineering
Author, co-author :
Charlier, Pascal; 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
Teyssié, Philippe ; Université de Liège - ULiège > Department of Chemistry > Laboratory of Macromolecular Chemistry and Organic Catalysis
Language :
English
Title :
Solution behavior of α,ω-(dimethylamino)polyisoprene coordinated to transition metal salts
Publication date :
19 March 1990
Journal title :
Macromolecules
ISSN :
0024-9297
eISSN :
1520-5835
Publisher :
American Chemical Society, Washington, United States - District of Columbia
BELSPO - Politique scientifique fédérale [BE] IRSIA - Institut pour l'Encouragement de la Recherche Scientifique dans l'Industrie et l'Agriculture [BE]
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