Issue 11, 2005
From the journal:

Physical Chemistry Chemical Physics

Dynamics of reversible supramolecular polymers: Independent determination of the dependence of linear viscoelasticity on concentration and chain length by using chain stoppers

W. Knoben,*a   N. A. M. Besseling,a   L. Bouteillerb  and  M.A. Cohen Stuarta  

* Corresponding authors

a Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, Wageningen, The Netherlands
E-mail: wout.knoben@wur.nl

b Université Pierre et Marie Curie-CNRS, UMR 7610: Chimie des Polymères, 4 place Jussieu, Paris Cedex 05, France

Abstract

The linear viscoelasticity of solutions of a hydrogen bonded reversible supramolecular polymer in the presence of a chain stopper was studied by rheometry and by dynamic light scattering using probe particles. The use of chain stoppers enabled the independent variation of the degree of polymerisation and the monomer concentration, and the effect of both parameters on rheology was investigated. Scaling exponents were obtained for the chain length and concentration dependence of the zero-shear viscosity and the terminal relaxation time, and these were compared to theoretical values. The results indicate that the reversible supramolecular polymer is semiflexible, and that both breaking and reptation of chains contribute to the stress relaxation. The parameters from macroscopic rheometry were compared to microscopic values obtained from probe particle diffusion. The particles probe the macroscopic viscoelastic parameters if their size is large compared to the correlation length in the system and to the (persistence) length of the polymer chains.

Graphical abstract: Dynamics of reversible supramolecular polymers: Independent determination of the dependence of linear viscoelasticity on concentration and chain length by using chain stoppers

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Article information

DOI
https://doi.org/10.1039/B503463A
Article type
Paper
Submitted
08 Mar 2005
Accepted
13 Apr 2005
First published
27 Apr 2005

Phys. Chem. Chem. Phys., 2005,7, 2390-2398

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Dynamics of reversible supramolecular polymers: Independent determination of the dependence of linear viscoelasticity on concentration and chain length by using chain stoppers

W. Knoben, N. A. M. Besseling, L. Bouteiller and M.A. Cohen Stuart, Phys. Chem. Chem. Phys., 2005, 7, 2390 DOI: 10.1039/B503463A

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