Accession Number:

AD0626078

Title:

EFFECTS OF ADDITIVES ON ANTIWEAR AND ANTIFRICTION PROPERTIES OF POLYSILOXANES,

Descriptive Note:

Corporate Author:

ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER WASHINGTON D C

Personal Author(s):

Report Date:

1965-12-01

Pagination or Media Count:

11.0

Abstract:

The effect of some organic compounds containing sulfur, chlorine, and phosphorus on the lubricating action of polysiloxanes of various types under heavy friction loads were studied. Additives that show a high activity in preventing scoring of steel in hydrocarbon lubricating media were much less effective in polysiloxanes. Their activity decreased sharply on transition from polyethylsiloxane to polymethylsiloxane and then to polymethylphenylsiloxanes. They almost had no effect on the lubricating capacity of polymethylphenylsiloxanes. The assumption is made that the decomposition of wellknown additives, which determines their effectiveness in preventing scoring of steel, initiates chain reactions in which the principal components of lubricating oils participate. With increasing stability of lubricating media to reactions in which free radicals take part, the activity of additives that counteract scoring decreases. This explains the lack of effectiveness in polymethylphenylsiloxanes of the additives considered. Author

Subject Categories:

  • Lubricants and Hydraulic Fluids

Distribution Statement:

APPROVED FOR PUBLIC RELEASE