Adsorption of surfactant on polystyrene-styrene interfaces

✍ Scribed by Richard G. Griskey; Clifford E. Woodward

• Publisher: John Wiley and Sons
• Year: 1966
• Tongue: English
• Weight: 293 KB
• Volume: 10
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1966.070100706

✦ Synopsis

The adsorption of sodium dodecyl sulfate on polystyrene-styrene interfaces has been studied.

Initial surfactant concentrations used in the study were 0.0004, 0.0008, and 0.004 mole/l. Two temperature levels, 25 and 75"C., were studied. Results showed no effect of initial surfactant concentration for a 20% interface at 25°C. However, the data for the 60% interface a t 25°C. showed an effect of initial surfactant concentration. The apparent anomaly in the results regarding effect of initial surfactant concentration was explained in terms of the behavior of polystyrenestyrene as a mixed adsorbent and the work of Harkins and co-workers, which showed that surfactant adsorption was a function of initial surfactant concentration over certain concentration ranges. Rate of surfactant adsorption appeared to be a function of surfactant adsorption raised to a power. The order of the adsorption appeared to be first-order for the 207, interface and second-order for the 60% interface.

Polystyrene interfaces of 20 and 607, were considered.