The Schott's pseudo second-order kinetics model  is usually used to evaluate the swelling kinetics behavior.
It indicates that the swelling of the superabsorbent composites obey the Schott's pseudo second-order kinetics model.
If the pseudo second-order kinetics is applicable (Eq.
The pseudo second-order kinetic model is based on adsorption equilibrium capacity and can be expressed as Eq.
The second-order kinetics
is commonly used to describe the interactions between a macromolecule and an immobilized affinity ligand,
The data in these experiments are best described in terms of second-order kinetics.
The kinetic study showed that the reaction order in the polymerization of DADMAC is higher than first-order, and the data can be satisfactorily described by second-order kinetics.
Again the experimental water absorbency values were very close to those derived theoretically from the Schott model of pseudo second-order kinetics (Table 5).
When the P(AM-IA) SAP or P(AM-IA)/silica SAPC contacts with the excess amount of water, diffusion takes place which is governed by a first-order process on a short time scale (Fick model), and then subsequently the rate of swelling at long swelling times is not governed by the diffusion, but rather is mainly controlled by stress relaxation of the amorphous regions of the polymer network which follows a pseudo second-order kinetics control (Scott model).
The final equations describe rheokinetics of polymerization for the initial stage of the process if an initiation reaction rate obeys second-order kinetics
Lagergren's pseudo-first-order and second-order kinetic
model parameters [q.
The straight-line plots of Ln(qe -qt) against t and of t/q t against t were used to determine the rate constants and correlation coefficients (R 2 ) for the first and second-order kinetic