6533b833fe1ef96bd129b5cd
RESEARCH PRODUCT
Polyelectrolytes Revisited: Reliable Determination of Intrinsic Viscosities
Bernhard A. Wolfsubject
chemistry.chemical_classificationQuantitative Biology::BiomoleculesPolymers and PlasticsIntrinsic viscosityRelative viscosityOrganic ChemistryInherent viscosityExtrapolationThermodynamicsPolymerPolyelectrolyteDilutionCondensed Matter::Soft Condensed MatterViscositychemistryMaterials ChemistryOrganic chemistrydescription
The linear extrapolation of (hh0)/(h0c) towards c !0 constitutes the basis of traditional methods to determine intrinsic viscosities (h), where h is the viscosity of polymer solutions of concentration c and h0 is the viscosity of the pure solvent. With uncharged macromolecules this procedure works well; for polyelectrolytes it fails because of the pronounced non-linearity of the above dependence at high dilution resulting from the increasing electrostatic inter- actions. This contribution presents a new method for the determination of (h). It rests upon the application of the laws of phenomenological thermodynamics to the viscosity of polymer solutions and introduces a generalized intrinsic viscosity enabling a comparison of differently charged and uncharged polymers.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-01-23 | Macromolecular Rapid Communications |