To study the influence of the flame-retardant melamine on foam properties of a polyurethane model system, single, vertical liquid foam films were studied. The presence of particles gives the possibility to observe the complete circulation in the film. The films of the model system have been found to
Effect of melamine on the foam kinetics of polyurethane model system. I. Surface properties in the absence and presence of melamine particles
✍ Scribed by N. Sándor; E. Geladé; R. Van Maris; Gy. Rácz
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 218 KB
- Volume
- 67
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
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.
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