Adsorption and desorption dynamics of associative polymers onto particulates of titanium dioxide, alumina and quartz

The authors have been investigating the adsorption and desorption dynamics of nonionic water soluble polymers on inorganic particles. The influence of the nature of polymers with and without associating hydrophobic end groups, the nature of adsorbents [TiO2, Al2O3 (neutral, acid and basic), and SiO2...

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Bibliographic Details
Published in:Polymer international 1993, Vol.32 (2), p.111-123
Main Authors: Filippov, Leonid K., Silebi, Cesar A., El-Aasser, Mohamed S.
Format: Article
Language:English
Subjects:
adsorption
Applied sciences
associative polymers
dynamics
Exact sciences and technology
heats of adsorption
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
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Summary:The authors have been investigating the adsorption and desorption dynamics of nonionic water soluble polymers on inorganic particles. The influence of the nature of polymers with and without associating hydrophobic end groups, the nature of adsorbents [TiO2, Al2O3 (neutral, acid and basic), and SiO2], polymer concentrations, linear velocity of fluids, and mutual diffusion of polymer molecules on the patterns of adsorption and desorption distribution of polymer concentrations are shown. The model polymer is a nonionic polyurethane polymer based on ethylene oxide. The polymer's structure is R‐O‐(DI‐PEO)6‐DI‐O‐R (R is C16H33, DI is isophorone diisocyanate, and PEO is CARBOWAXTM with a molecular weight of 8200). The phenomenological models of association and dissociation kinetics of associative polymers are suggested. The half‐lives of clusters into adsorption and desorption layers are estimated. It is shown that heats of desorption of associative polymers are dependent essentially on heats of dissociation of clusters.
ISSN:0959-8103
1097-0126
DOI:10.1002/pi.4990320202