The Adsorption of Polyvinyl Acetate

The Adsorption of Polyelectrolytes on Hydroxyapatite Crystals

“…Very low ionic strengths are also avoided because partial shielding of the polymer chain charge by background electrolyte ions is incorporated in the model. In other studies, the predictions of Hesselink's model have been shown to agree well with published experimental work (25,28).…”

Polyacrylamide at Solid/Liquid Interfaces

“…The adsorption rate is then described by (43) d⌫ dt ϭ C b ⌽͑⌫͒ K͑⌫͒. [7] In the absence of a glassy layer, K(⌫) is assumed to be constant and the rate of adsorption to be limited by the term ⌽(⌫). Defining the relative degree of surface coverage as…”

“…[7] and [10]. The dashed line of slope ϭ 1 corresponds to the random sequential adsorption model and is valid for Ͻ 0.65 (dotted line) while the solid line of slope ϭ 1.5 determines the domain of validity of the theory of de Gennes.…”

“…In thermodynamic terms, polymer adsorption was treated like that of low-molecular-weight solutes, for which Langmuir-type kinetics and equilibria had been found to apply (5,6). Adsorption enthalpy was for example derived from the temperature dependence of adsorption isotherms (7)(8)(9). Killmann pointed out that this method might cause problems insofar as the conditions of isostericity and reversibility were not fulfilled in the case of polymer adsorption and showed that contradictory results were obtained using the Clausius-Clapeyron equation or direct measurements of adsorption enthalpy (10).…”

Temperature Dependence of Adsorption of Polymer Mixtures from Solutions

“…With increasing temperature, adsorption may both increase and decrease, which is connected with various factors: changing the thermodynamic quality of the solvent, variation of the sizes of macromolecular coils, increasing the adsorption capacity of an adsorbent in relation to macromolecules due to desorption of the solvent molecules, etc. (8). Depending on the nature of adsorbent, polymer, and solvent, various factors will manifest themselves in different degrees.…”