Effect of melamine on the foam kinetics of polyurethane model system. I. Surface properties in the absence and presence of melamine particles

Abstract

The dynamic and equilibrium surface tension of a polyurethane model system with and without melamine particles was investigated. It is concluded that the diffusion is the rate-determining factor in the adsorption process. Greater dynamic surface tension is found for the melamine-containing dispersion than for the corresponding solution in the absence of particles. A possible explanation is given by the presence of attractive interactions between the particles. The adsorption of the surfactant on the melamine surface, wetting properties of the particles by the investigated system, and the rheological behavior of the dispersions are discussed. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67:1729–1738, 1998