Photon correlation spectrometric measurements of the hydrodynamic layer thicknesses of adsorbed polyethylene oxides on precipitated silica

Large deformation in filled networks of different architecture and its interpretation in terms of the van der Waals network model

“…Moreover, to have computed the average chain length within the filler network with the aid of Equation (25) all the time using the same contact parameter a(R) 2R (see Table 5), is equivalent to always having the same surface-density of chemical crosslinks. This is, on principle, in accordance with findings published by Killmann et al [19,20] who observed essentially that layers on different silica particles, absorbed from solution, were always equal.…”

“…To account for these boundary effects, it is possible to simply define the maximum strain parameter by (19) so that the analytical form of the composite modulus strictly is identical to the Einstein-Smallwood formula-…”

Effect of Adsorbed Polyethylene Oxide on the Rheology of Colloidal Silica Suspensions

“…Killmann et al (6)(7)(8)(9), however, did not examine the adsorption region beyond the first plateau. The present study shows that after the first plateau was reached, more PEO adsorbed when the equilibrium polymer concentration increased above approximately 6000 mg L −1 , resulting in a second plateau region at 1.20 mg m −2 surface coverage (see Fig.…”

“…Equations [5] through [7] indicate that the Krieger-Dougherty model predicts a maximum packing fraction of (1) 0.71 for sterically stabilized suspensions of silica particles of two different sizes, and (2) values of 0.615 and 0.635 for electrostatically stabilized suspensions of 0.60-and 0.86-µm silica particles, respectively.…”

The Effect of Neutral Polymer and Nonionic Surfactant Adsorption on the Electroacoustic Signals of Colloidal Silica

“…The e 0 kD factor for the nonyl phenol ethoxylates was z Å c d e 0 kD . [31] determined using Eq. [32].…”