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Princen's modification of Vonnegut's rotating drop procedure for measuring inter‐facial tension between low viscosity liquids has been adapted for use with pairs of liquid polymers with viscosities up to 5000 poise. Extrapolation to infinite time of results obtained with 10–20 min of rotation provided steady state data as indicated by its corre‐spondence with results reported from other techniques. An adaptation of this procedure was also found useful for determining surface tension values of molten polymers at temperatures up to 290°C. Reductions of 60–70% in interfacial tension between viscous samples of a polydimethylsiloxane and a copolyether were accomplished by addition of 1–2% of amphi‐pathic or polar compounds such as polydimethylsiloxane‐polyoxyethylene copolymers and carboxyl‐substituted polydimethylsiloxanes. A linear reduction in interfacial tension with a logarithmic increase of additive concentration was noted.

This paper reviews the published literature on the uses of oleochemical surfactants and lubricants in the textile industry with a dual emphasis on textile technology and effects that oleochemicals can have on that technology. Oleochemical derivatives are used in the textile industry as surfactants, emulsifiers, wetting agents, antistatic agents, softeners, antimicrobial agents, water and oil repellents, antisoil agents, lubricants, cohesive agents and dyeing assistants. The relationship between the amount of fatty acid derivatives consumed in textile operations and global fiber production is discussed. Small amounts of oleochemicals acting at interfaces are invaluable in their effects on textiles. Oleochemical surfactant chemical and physical properties of importance in textile operations are described, and the relationships between certain properties of oleochemicals and their performance on textile fibers are reviewed. The basic principles and technology of spin finishes and textile processing aids are discussed. The effects of oleochemical surfactants in dyeing and as finishing agents for textile fibers are described briefly. The conclusion presents the prognosis for the future of oleochemicals in the textile industry.

A study was made of the transfer of compounds, similar to those found in human sebum, from cellulose to polyethylene terephthalate films and the deposition of these soils on polymer films from surfactant and aqueous solutions. The polymer films were used as end windows of a Geiger tube. The soils were labeled with radioactive 14 carbon so that the amount of sorbed material could be continuously monitored. The effect of variables such as detergent type, detergent concentration, temperature, sorption time, addition of sodium carboxymethylcellulose, and soil concentration on deposition have been investigated. Results are discussed in terms of possible mechanisms for soil deposition and changes in wash conditions that should reduce deposition on man-made polymers.