EFFECTS OF ADDITIVES ON ANTIWEAR AND ANTIFRICTION PROPERTIES OF POLYSILOXANES,
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1965
- Accession Number
- AD0626078
Entities
People
- G. V. Vinogradov
- M. I. Nosov
Organizations
- United States Army Foreign Science and Technology Center