The effect of surface-active substances on the properties of lithium-containing lubricants based on synthetic fatty acids

1969 ◽  
Vol 5 (11) ◽  
pp. 799-802
Author(s):  
V. V. Vainshtok ◽  
M. S. Gusarova ◽  
S. I. Karakash
Keyword(s):  
Fatty Acids ◽  
Surface Active ◽  
Active Substances ◽  
Effect Of Surface

The Effect of Surface-Active Substances and Electrolytes upon the Crystallization of Sulfur from Rubber Solutions

1935 ◽  
Vol 8 (2) ◽  
pp. 250-258
Author(s):  
B. Dogadkin ◽  
J. Margolina
Keyword(s):  
Fatty Acids ◽  
Marked Reduction ◽  
Naphthenic Acids ◽  
Optimum Degree ◽  
Polar Groups ◽  
Small Crystals ◽  
Surface Active ◽  
Active Substances ◽  
Calcium Oleate ◽  
Effect Of Surface

Abstract 1. If surface-active substances are added directly to rubber or to the solvent e. g., fatty acids and their salts, naphthenic acids, thionaphthenic acids, etc., there is after evaporation of the solvent a marked reduction in the size of the sulfur crystals which are formed in the rubber films. 2. The size of the sulfur crystals depends upon the concentration of the surface-active substances in the rubber solution. The precipitate with the greatest degree of dispersion is obtained at a definite optimum degree of concentration, e. g., one per cent of calcium oleate and fish oil, based on the rubber. A higher concentration of surface-active substances leads to an increase in the size of the sulfur crystals. 3. The dispersing action of capillary-active substances decreases with the age of rubber solutions, but this was not observed alter storage of the mixtures and films themselves. 4. Rubber softeners in the molecules of which there are no polar groups (e. g., vaseline oil) show no dispersing action. 5. Some electrolytes, added to the rubber solution, likewise promote the dispersion of sulfur in the form of small crystals. 6. The dispersing action of surface-active substances and electrolytes disappears with an increase in the temperature at which the film is formed (up to 70° C.). The sulfur is precipitated in the form of monoclinic dendrites and rhombic crystals.

Effect of surface-active substances on the fibre-forming process and properties of nitron fibre

1986 ◽  
Vol 17 (3) ◽  
pp. 173-176
Author(s):  
Yu. M. Malyshev ◽  
A. A. Geller ◽  
S. I. Slepakova ◽  
B. �. Geller
Keyword(s):  
Forming Process ◽  
Nitron Fibre ◽  
Surface Active ◽  
Active Substances ◽  
Effect Of Surface
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