The Oxidative Stability of Deuterated Lubricants
Abstract
Oxidative stability tests were performed on deuterated and non- deuterated synthetic hydrocarbons containing a proprietary antioxidant additive, tetraesters containing antioxidants, and azelate esters. The substitution of deuterium for hydrogen in these lubricant systems has resulted in a significant improvement in their oxidative stability. The 14-fold improvement observed when 98% deuterated hexanoic acid was used to prepare pentaerythritol tetrahexanoated cannot be explained by a simple kinetic isotope effect alone. The deuterated compound outlasted its non-deuterated counterpart even though the original antioxidant had been almost completely consumed within the first quarter of the evaluation. This phenomenon should be investigated in further research; and theoretical models must be developed and tested in the laboratory.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1982
- Accession Number
- ADA111982