In the present study, the role played by the reactants concentration on the nonlinear response of a {Belousov-Zhabotinsky} {(BZ)} system to the addition of a self-assembling non-ionic polymer, poly(ethylene glycol) {(PEG)}, has been assessed. The oscillatory parameters are influenced to an extent that significantly depends on the concentration of both the polymer and the {Belousov-Zhabotinsky} components. The effects obtained were attributed to the reaction among some of the {BZ} key species and the backbone and the alcoholic functional groups of the polymer, both in its monomeric and aggregated {forms.Support} to the proposed perturbation mechanism has been provided by performing numerical simulations with the {MBM} model and by characterizing the physicochemical behavior of the {PEG} aqueous solution by means of viscosimetric and spectrofluorimetric measurements.
Oscillatory dynamics of the Belousov-Zhabotinsky system in the presence of a self-assembling nonionic polymer. Role of the reactants concentration
ROSSI, FEDERICO;
2010
Abstract
In the present study, the role played by the reactants concentration on the nonlinear response of a {Belousov-Zhabotinsky} {(BZ)} system to the addition of a self-assembling non-ionic polymer, poly(ethylene glycol) {(PEG)}, has been assessed. The oscillatory parameters are influenced to an extent that significantly depends on the concentration of both the polymer and the {Belousov-Zhabotinsky} components. The effects obtained were attributed to the reaction among some of the {BZ} key species and the backbone and the alcoholic functional groups of the polymer, both in its monomeric and aggregated {forms.Support} to the proposed perturbation mechanism has been provided by performing numerical simulations with the {MBM} model and by characterizing the physicochemical behavior of the {PEG} aqueous solution by means of viscosimetric and spectrofluorimetric measurements.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
