| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5187613 | Polymer | 2009 | 5 Pages |
Abstract
Charging of poly(acrylic acid) (PAA) in the presence of different alkali metal counterions was studied by precision potentiometric titration. The charging behavior can be described with a novel cylinder Stern model quantitatively. This model is based on the Poisson-Boltzmann equation in the cylinder geometry and a constant Stern capacitance. One finds an increasing cylinder radius with increasing mass of the alkali metal ion and a correspondingly decreasing Stern capacitance. The intrinsic ionization constants for the uncharged polymer are found to decrease with ionic strength, similarly to weak acids of low molecular mass.
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Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Amin Sadeghpour, Andrea Vaccaro, Samuel Rentsch, Michal Borkovec,