The Adsorption of Flexible Macromolecules

Polyacrylamide at Solid/Liquid Interfaces

“…Since the same average charge of the aluminum ion was observed at higher salt con- centration and lower pH (4.6), the different species Al(OH) 3 0 , Al(OH) 2 ϩ , Al(OH) 1 2ϩ , and Al 3ϩ may be assumed to still represent 0, 25, 8, and 67%, respectively (67) Addition of hydrolyzed polyacrylamide and polyacrylic acid induces a pH drop where the amplitude depends on the aluminum ion and carboxylic concentrations. The hydrogen ion production during complex formation may be interpreted on the basis of [33] where m and n vary from 0 to 2 and from 1 to (3 Ϫ m), respectively.…”

“…The flux of chains from solution to interface J si is J si ϭ K si ϫ C b , [3] with K si ϳ D/R, where D is a diffusion coefficient characterizing the chain transfer within a layer of thickness R. The inverse flux is given by…”

“…The interfacial behavior of macromolecules adsorbed at solid-liquid interfaces has aroused interest since 1950 (1,2) and theoretical studies immediately accompanied the early experimental investigations (3). The first reference book in this domain was the Lipatov and Sergeeva Adsorption of Polymers (4), which was published in 1974.…”

Robert Simha: A Life with Polymers

“…New endeavors with old friends were undertaken. First, collaboration with Harry L. Frisch and Fred Eirich, now both at Brooklyn Polytechnic, led to development and refinement of a statistical mechanical model of the adsorption of flexible macromolecules on surfaces [Simha et al, 1953], still widely cited as a seminal paper in the theory of polymer adsorption isotherms. Since the early days of seminars in Mark's Vienna Laboratory, Robert had been interested in the statistical thermodynamics of the liquid state, and the success and failures of a particular version, the Lennard-Jones and Devonshire cell theory.…”

Adsorption of Lignosulphonates on Solids

“…The theoretical aspects of the adsorption of flexible non-ionic polyiners have been treated in detail by Frish, Eirich, and Simha (9,10,11,12). Their statistical mechanical analysis indicates that only a small number of randomly located segments of the flexible polymer chain are actually adsorbed Can.…”