Adsorption-desorption mechanism of a cationic polyelectrolyte based on dimethylaminoethyl polymethacrylates at the water/1,2-dichloroethane interface

JULIETA S. RIVA; DANTE M. BELTRAMO; LIDIA M. YUDI

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2014 vol. 115 p. 370 - 370

he electrochemical behaviour of the cationic polymer Eudragit®E100 at the polarized water/1,2-dichloroethane interface was studied. The voltammetric response was found to be dependent on thepH of the aqueous phase solution, on the nature of the organic electrolyte, and it was also time depend-ent during multi-cyclic voltammetry experiments. The results suggest that a diffusion process coupledto an adsorption or re-arrangement of E100 molecules at the interface is taking place. From the analysisof the desorption process, it was determined the presence of a strong attractive interaction between theadsorbed species at the interface and the lateral interaction parameter was calculated.