KINETICS MODELING OF COUPLING REACTIONS IN GELATIN LAYERS

A numerical model was designed to investigate the kinetics of the coup ling reaction of quinonediimine (QDI), with solvent dispersion coupler in a gelatin layer. In this model the diffusion, deamination, and int erfacial reaction of QDI with the coupler droplets to form dye within the layer were involved, and the corresponding numerical expressions w ere derived. This model, with all available parameters, can be used to simulate the kinetics of the coupling reaction and find the apparent rate constant, the specific rate constant, and the diffusion coefficie nt of QDI when combined with experimental kinetic measurements. In add ition, more details (e.g., the distributions of QDI and dye formed wit h respect to time or space in the layer) can also be obtained with the model.