Microrheology of polyethylene oxide using diffusing wave spectroscopy and single scattering.
2003 47:303–19.ĭasgupta BR, Tee SY, Crocker JC, Frisken BJ, Weitz DA. Characterizing complex fluids with high frequency rheology using torsional resonators at multiple frequencies. 1993 25:553–9.įritz G, Pechhold W, Willenbacher N, Wagner NJ. Measurement of viscoelastic properties of polymer-solutions by torsional crystals. An instrument for precise measurement of viscoelastic properties of low viscosity dilute macromolecular solutions at frequencies from 20 to 500 kHz. Stokich TM, Radtke DR, White CC, Schrag JL. Piezoelectric crystals and their applications to ultrasonics. Viscoelasticity of concentrated isotropic solutions of semiflexible polymers. Dynamics of polymer molecules in dilute solution: viscoelasticity, flow birefringence and dielectric loss. A theory of the linear viscoelastic properties of dilute solutions of coiling polymers. Concentration dependence of the longest relaxation times of dilute and semi-dilute polymer solutions. Elastic turbulence in a polymer solution flow. Single polymer dynamics in an elongational flow. The structure and rheology of complex fluids.
The high-frequency characteristic of QCM-D makes it possible to directly study the viscoelasticity of polymer solutions in a low-viscosity solvent, which is complementary to conventional rheometers working at low frequency.įerry JD. The solvent quality gradually worsened for PEG with increasing K 2SO 4 concentration, which was verified by decreases in the polymer intrinsic viscosity and the corresponding Mark–Houwink exponent. With increasing K 2SO 4 concentration, the excluded volume exponent ν of PEG decreased from 0.565 in water to 0.55 in 0.19 mol/L K 2SO 4, and 0.50 in 0.43 mol/L K 2SO 4. The obtained viscoelastic properties of PEG in K 2SO 4 solutions agree well with the Zimm model predictions for linear polymer chains.
The viscoelasticity of poly(ethylene glycol) (PEG) in aqueous solutions with different concentrations of potassium sulfate (K 2SO 4) was studied by quartz crystal microbalance with dissipation (QCM-D), after coating a rigid supported lipid bilayer of 1,2-dioleoyl- sn-glycero-3-phosphocholine on the silicon oxide substrate.
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