SEDL / STP / STP1112-EB / STP16879S

Applications of Dynamic Surface Tension to Adjuvants and Emulsion Systems

Tann, RS
R&D chemistR&D chemistresearch and development director, Agricultural group of Witco Inc.Oilfield product group for Witco Inc.Witco Inc., Houston, TX

Berger, PD
R&D chemistR&D chemistresearch and development director, Agricultural group of Witco Inc.Oilfield product group for Witco Inc.Witco Inc., Houston, TX

Berger, CH
R&D chemistR&D chemistresearch and development director, Agricultural group of Witco Inc.Oilfield product group for Witco Inc.Witco Inc., Houston, TX

Pages: 15    Published: Jan 1992

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Abstract

Dynamic surface tension (DST) measurements were obtained using the Maximum Bubble Pressure Technique for various adjuvant and emulsion systems. These results were compared with traditional test methods for adjuvants and emulsion systems.

The adjuvants were compared to: 1.) Drave's wetting times, 2.) Static surface tension 3.) Static contact angle. The relationships between these properties and dynamic surface tensions at various freguencies were studied. The emulsion system studied contained an anionic surfactant and a nonionic surfactant in a 4 #/gallon pesticide formulation. The resulting emulsions were measured for dynamic surface tension at varying frequencies and compared to traditional emulsion results.

This work demonstrates the application of dynamic surface tension to the study of adjuvants and emulsion stability.